Category: Bounty Factory (Page 1 of 2)

Incentive Policy for Coordinated Vulnerability Disclosure


For the past ten years or so, organizations have been trying to implement operational policies to avoid “Full Disclosure” reports or “Open Bug Bounty” whose methods are not that good in terms of honesty and responsibility.

Speaking of responsibility, you may be familiar with the notion of “Responsible Disclosure” and you wonder how it differs from the concept of Coordinated Vulnerability Disclosure?

The concept of responsible disclosure has too often been at the root of endless discussions:

On the one hand the vendors denounce “Disclosing a vulnerability without providing patches is not responsible”.
and the other, “Don’t fix this vulnerability as quickly as possible is not responsible”, say security researchers.

During this precious time when both sides argue, the system concerned is at the opponent’s mercy.

In order to move towards greater efficiency and to get out of sterile debates, it is therefore important to avoid speaking of “responsible disclosure”. This is why many organizations advocate the concept of “Coordinated Vulnerability Disclosure” (CVD) in order to promote and strengthen cooperation between the various actors in cybersecurity, all of whom have a common goal: Make the Internet safer.

Coordinated Vulnerability Disclosure

Coordinated Vulnerability Disclosure

Theory & Definitions

Coordinated Vulnerability Disclosure (CVD) is a process aimed at reducing risk and ultimately mitigating potential damage caused by a vulnerability affecting an information system. CVD is a process that cannot be reduced to the deployment of a patch or publication of a report, even though these events are indicators of the efficiency of cooperation.

A bounty bug platform such as facilitates this process by encouraging the cooperation of thousands of security experts and organizations.
Cooperation: it is a key element of Cyber Governance.

Guillaume Vassault Houlière | YesWeHack CEO

Coordinated Vulnerability Disclosure is therefore the process of collecting information from Security Researchers, coordinating the sharing of this information among actors, and disclosing the existence of vulnerabilities (software or even hardware) and their mitigation measures to various stakeholders, including the public.

Coordinated Vulnerability Disclosure significantly increases the likelihood of success of any vulnerability response process. Contributions are often vulnerability reports written by security researchers.

CVD reports for a product (software or hardware) typically include patches as well as vulnerability report documentation or recordings in a vulnerability database.

NB: many operational vulnerabilities can be corrected by the operator and do not necessarily result in public disclosure.

Vulnerability disclosure is a process by which vendors and people who discover vulnerabilities can work collaboratively to find solutions that reduce the risks associated with a vulnerability.

ISO/IEC 29147 standard defining Vulnerability Disclosure

This process includes actions such as the reporting, coordination and publication of information on one vulnerability, its mitigation or, ideally, its remediation.

Let’s zoom in the concept :


  • Reduce the risk of damage
  • Believe in good deeds, believe in good Samaritans
  • Avoid randomness
  • Boost cooperation
  • Follow the code of ethics
  • Learn from the OODA loop
  • Consider CVD as a process navigating between the “best” and the “worst”.


  • Ensure that identified vulnerabilities are – well – addressed;
  • Reduce the risk of vulnerability;
  • Provide users with sufficient information to assess the risks associated with the vulnerabilities of their systems;


Coordinated Vulnerability Disclosure commonly begins with the detection of a vulnerability and ends with the deployment of patches or mitigation.

Therefore, several actors are involved in the CVD process:

  • Security researcher – the person or organization that identifies vulnerability.
  • Reporter – the person or organization who notifies the vendor
  • Vendor – the individual or organization that created or maintains the product that is vulnerable
  • System Administrator – an individual or organization that must implement a corrective action or take other corrective actions.
  • Coordinator – an individual or organization that facilitates the coordinated response process


  • Discovery – Someone discovers a vulnerability in a product.
  • Report – The product vendor or a third party coordinator receives a vulnerability report.
  • Qualification – The recipient of a report validates it to ensure its accuracy before prioritizing it for further action.
  • Remediation – A remediation plan (ideally a software patch) is developed and tested.
  • Public Awareness – Vulnerability and corrective measures are disclosed to the public.
  • Deployment – Corrective measures are applied to the systems concerned.

The reporting step is important because it requires the creation of secure channels to ensure that transmitted information is not intercepted by a third party.

However, there are some obstacles within the process:

  • No vendor contact available – This may occur because a contact could not be found or because the contact is not reactive.
  • Termination of cooperation – participants in the CVD process may have other priorities that attract their attention.
  • Information leakage – Whether intentional or unintentional, information for a small group of actors can be passed on to others who are not involved in the CVD process.
  • Independent Discovery – Any vulnerability that can be found by one individual can be found by another, and not everyone will tell you about it.
  • Active Exploitation – Evidence that a vulnerability is being actively exploited by adversaries requires accelerating the CVD process to reduce users’ exposure to risk.
  • Communication is deteriorating – CVD is a process of coordinating human activities. As such, its success depends on the quality of the relationships between the participants.
  • Marketing – In some cases, vulnerabilities can be used as a marketing tool. This is not always conducive to the smooth running of the CVD process.

To sum up:

Vulnerability disclosure practices are no longer restricted to web applications. The Internet of Things and the constellation of SCADA systems, connected health devices, CCTV, Connected cars, etc. have become so dependent on software and the Internet that they increase the exposure perimeter and will inevitably be exposed to new attacks.

The Coordinated Vulnerability Disclosure is a major ally to federate the largest number of cyberspace actors and stimulate the exchange of knowledge to ensure both security and privacy protection by design.

By encouraging cooperation, CVD will enable all stakeholders not only to defend their common information assets but also to fight more effectively against the black market and the resale of Zerodays.


The set is now planted, so let’s switch from theory to practice.

Security.txt: the promising RFC!

In order to respond to the lack of contacts available to disclose a vulnerability on a website, security researcher EdOverflow, well inspired by the role of the famous robots. txt, suggested since the beginning of August 2017 to include in each website the file security.txt as a reference file containing the procedure to be followed to disclose more effectively to the editor of a site a bug, a vulnerability.

This approach has the merit of establishing clear guidelines for security researchers on how to report security issues and allows bug bounty programs to use them as a basis for defining the attack perimeter for future researchers.

security.txt is a draft that has been submitted to the RFC for review. This means that security.txt is still in the early stages of development. You can contribute on github!

Bug Bounty as part of your disclosure policy

As part of agile development on their own products, more and more vendors are choosing to be proactive by stimulating and cooperating with IT researchers:

  • by relying on in-house resources and expertise;
  • by contracting directly with external researchers;
  • via a platform that will connect researchers and one vendor. The latter will therefore pay for the result and will be able to choose between various options such as program management or even patch management if its internal resources are not sufficient.

NB: The creation and long-term implementation of a Bug Bounty program is considered as an indicator of the maturity of publishers’ E-governance in terms of vulnerability.

Since 2013, YesWeHack has been developing tools that greatly facilitate the implementation of an incentive policy for CVD.

YesWeHack, its community and ecosystem of services enable organizations and IT security researchers to better cooperate.

Thanks to the tools developed by YesWeHack, beneficiary organizations can more easily overcome the obstacles encountered by their CVD policy. In addition, organizations gain reputation by demonstrating their appetite and willingness for continuously improving their systems. as the first European platform of Bug bounty.

Differentiating criteria

  • Cooperation with European partners and providers as a matter of sovereignty.
  • Legal and technical infrastructure that meets the highest security requirements.
  • Security and confidentiality of communications based on encryption and compliance with ISO standards.
  • Securing financial transactions between organizations and security researchers.
  • Payment platform compliant with European anti-money laundering and anti-terrorist financing arrangements.
  • Support throughout the entire process: from the drafting of the program to assistance with corrective measures.
  • Operational ranking of the best researchers: Management of a security research community.
  • Reactivity that enables the best researchers to be mobilized in record time.
  • Ability to organize different types of Bounty bug programs (Private / Public / In situ / Hardware and/or Software).

Give it a try ! Register on

What should I do if a product does not offer Bug Bounty or Security.txt?

A simple and effective tool to avoid full disclosure of vulnerabilities in the wild.

It is important to note that some products (software or hardware) do not have their own Bug Bounty program. Thus, it is difficult for a security researcher to report a vulnerability to a vendor. Not all countries have a law allowing this kind of practice, as is the purpose of Article 47 of the Law for a Digital Republic initiated by ANSSI.

YesWeHack has created to facilitate the escalation of vulnerabilities in a secure and even anonymous way and put in touch the different actors working for a safer Internet.

Thanks to Zerodisclo several obstacles are removed: no login, anonymization of the report via the Tor (.onion) network and mandatory and automatic encryption of the report content with the public PGP key of the CERT chosen.

The list of CERTs included in

Please find below the infographic of

Politique Incitative à la Divulgation Coordonnée de Vulnérabilités.

 ☄ Constat

Depuis une dizaine d’années, les organisations tentent de mettre en place des politiques opérationnelles pour éviter les rapports sauvages de failles ou autre “Full Disclosure” ou “Open Bug Bounty” dont les méthodes laissent à désirer en terme d’honnêteté et de responsabilité.

A propos de responsabilité, vous connaissez peut-être la notion “Divulgation Responsable” ( Responsible Disclosure – chez nos amis anglophones) et vous vous demandez en quoi elle est différente de la Divulgation Coordonnée de Vulnérabilités?

Le concept de divulgation responsable a trop souvent été au cœur de discussions sans fin :

  • d’un côté les vendeurs/éditeurs s’insurgent “Divulguer une vulnérabilité sans fournir de patchs n’est pas responsable”
  • et de l’autre “Ne pas corriger cette vulnérabilité au plus vite n’est pas responsable”, rétorquent les chercheurs en sécurité.

Pendant ce temps précieux où les parties se chamaillent, le système concerné est à la merci de l’adversaire et ce dernier en profite pour commettre ses méfaits.

Afin de tendre vers plus d’efficacité et sortir des débats stériles, il convient donc d’éviter de parler de “divulgation responsable”. C’est la raison pour laquelle de nombreuses organisations plaident en faveur du concept de “Divulgation Coordonnée de Vulnérabilités” (DCV) afin de promouvoir et renforcer la coopération entre les différents acteurs de la cybersécurité qui tous ont un objectif commun : rendre l’Internet plus sûr.

Coordinated Vulnerability Disclosure

☄ Théorie & Définitions

La Divulgation Coordonnée de Vulnérabilités ( DCV ) est un processus visant à réduire les risques et in fine à atténuer les dommages potentiellement causés par une vulnérabilité ciblant un système d’information. La DCV ( CVD en anglais ) est un processus que l’on ne peut pas réduire au déploiement d’un correctif ou à la publication d’un rapport quand bien même ces événements sont des indicateurs de l’efficience de la coopération.

Une plateforme de bug bounty telle que facilite ce processus en incitant à la coopération des milliers d’experts en sécurité et des organisations.
La coopération : c’est une pièce maîtresse de la Cyber-Gourvernance.

Guillaume Vassault Houlière | YesWeHack CEO

La divulgation coordonnée des vulnérabilités est donc le processus qui consiste à collecter des informations auprès des chercheurs de vulnérabilités, à coordonner le partage de ces informations entre les acteurs et à divulguer l’existence de vulnérabilités (logicielles voire matérielles) et leurs mesures d’atténuation à diverses parties prenantes, y compris le grand public.

La divulgation coordonnée des vulnérabilités accroît de manière significative les chances de réussite de tout processus de réponse à vulnérabilité. Les contributions sont souvent des rapports de vulnérabilité rédigés par des chercheurs en sécurité.

Les rapports DCV concernant un produit (logiciel ou matériel) comprennent généralement des correctifs ainsi que des documents de rapport de vulnérabilité ou des enregistrements dans une base de données de vulnérabilités.

NB: de nombreuses vulnérabilités opérationnelles peuvent être corrigées par l’opérateur et elles ne se traduisent pas forcément par une divulgation publique.

La divulgation des vulnérabilités est un processus par lequel les fournisseurs et les personnes qui découvrent des vulnérabilités peuvent travailler en collaboration pour trouver des solutions qui réduisent les risques associés à une vulnérabilité.

Norme ISO/CEI 29147 définissant la Divulgation de Vulnérabilités

Ce processus comprend des actions telles que le signalement, la coordination et la publication d’informations sur une vulnérabilité, son atténuation voire, dans l’idéal, sa résolution.

A ce stade, décortiquons la DCV :

Les principes:

  • Réduire les risques donc les dommages
  • Croire aux bonnes actions donc aux bons samaritains
  • Éviter le hasard
  • Stimuler la coopération
  • Suivre la déontologie
  • Apprendre de la boucle OODA
  • Considérer la DCV comme un processus naviguant entre le “meilleur” et le “pire”.

Les objectifs :

  • veiller à ce que les vulnérabilités identifiées soient prises en compte;
  • réduire au minimum le risque de vulnérabilité;
  • fournir aux utilisateurs suffisamment d’informations pour évaluer les risques liés aux vulnérabilités de leurs systèmes;

Les acteurs :

La Divulgation Coordonnée de Vulnérabilités commence communément par la détection d’une vulnérabilité et se termine par le déploiement de correctifs ou d’atténuation.

Par conséquent, plusieurs acteurs sont impliqués dans le processus de CVD :

  • Chercheur en sécurité – la personne ou l’organisation qui identifie la vulnérabilité.
  • Rapporteur – la personne ou l’organisation qui avise le fournisseur de la vulnérabilité.
  • Fournisseur – la personne ou l’organisation qui a créé ou entretient le produit vulnérable.
  • Administrateur système – personne ou organisation qui doit déployer un correctif ou prendre d’autres mesures correctives.
  • Coordinateur – personne ou organisation qui facilite le processus d’intervention coordonnée.

Les étapes :

  • Découverte – Quelqu’un découvre une vulnérabilité dans un produit.
  • Rapport – Le fournisseur du produit ou un tiers coordinateur reçoit un rapport de vulnérabilité.
  • Qualification – Le destinataire d’un rapport le valide pour s’assurer de son exactitude avant de le prioriser en vue d’une action ultérieure.
  • Remédiation – Un plan d’assainissement (idéalement un correctif logiciel) est élaboré et mis à l’essai.
  • Sensibilisation du public – La vulnérabilité et les mesures correctrices sont divulguées au public.
  • Déploiement – Les mesures correctrices sont appliquées aux systèmes concernés.

La phase de rapport est importante car elle requiert de créer des canaux sécurisés pour éviter que les informations transmises soient interceptées par une tierce partie.

Ce processus connaît cependant des obstacles :

  • Aucun contact du fournisseur disponible – Ceci peut se produire parce qu’un contact n’a pas pu être trouvé ou parce que le contact n’est pas réactif.
  • Cessation de coopération – les participants au processus de DCV pourraient avoir d’autres priorités qui attirent leur attention.
  • Fuites d’information – Qu’elles soient intentionnelles ou non, les informations destinées à un groupe restreint d’acteurs, peuvent être transmises à d’autres personnes qui ne participent pas au processus de DCV.
  • Découverte indépendante – Toute vulnérabilité qui peut être trouvée par un individu peut être trouvée par un autre, et tous ne vous en parleront pas.
  • Exploitation active – Les preuves qu’une vulnérabilité est activement exploitée par des adversaires nécessitent d’accélérer le processus de DCV pour réduire l’exposition des utilisateurs au risque.
  • La communication se détériore – La DCV est un processus de coordination d’activités humaines. En tant que tel, son succès dépend de la quatité des relations entre les participants.
  • Marketing – Dans certains cas, les vulnérabilités peuvent être utilisées comme un outil de marketing. Cela n’est pas toujours propice au bon déroulement du processus de DCV.

En synthèse :

Les pratiques de divulgation des vulnérabilités ne se limitent plus aux applications web. L’Internet des objets et la constellation de systèmes SCADA, d’appareils de santé connectés, de caméras de surveillance, de voitures connectées, de drones, etc. sont devenus tellement dépendants des logiciels et de l’Internet qu’ils augmentent le périmètre d’exposition et, de ce fait, seront inéluctablement exposés à de nouvelles attaques.

La Divulgation Coordonnée de Vulnérabilités est une alliée majeure pour fédérer le plus grand nombre d’acteurs du cyberespace et stimuler l’échange de savoirs pour mieux assurer dès la conception : la sécurité et la protection de la vie privée.

En incitant à la coopération, la DCV permettra à tous les acteurs de la cybersécurité non seulement de défendre leurs bastions et leurs patrimoines informationnels mais aussi de lutter plus efficacement contre le marché noir et/ou la revente de Zerodays.


 ☄Le décor est maintenant planté,

alors passons de la théorie à la pratique.

Security.txt : la prometteuse RFC !

Afin de répondre au manque de contacts mis à disposition pour divulguer une vulnérabilité sur un site web , le chercheur en sécurité EdOverflow, bien inspiré par le rôle du fameux robots.txt, a suggéré depuis début août 2017 d’inclure dans chaque site web le fichier security.txt comme fichier de référence contenant la marche à suivre pour divulguer plus efficacement à l’éditeur d’un site un bug, une vulnérabilité.

Cette méthode a le mérite d’établir des lignes directrices claires pour les chercheurs en sécurité sur la façon de signaler les problèmes de sécurité et permet aux programmes de bug bounty de s’en inspirer pour mieux définir le périmètre d’attaque proposé aux futurs chercheurs.

Security.txt est une ébauche qui a été soumise à l’examen de la RFC. Cela signifie que security.txt en est encore aux premiers stades de développement. Vous pouvez y contribuer sur github !


Le Bug Bounty comme composant de votre politique de divulgation

Dans le cadre d’un développement agile sur leurs propres produits, de plus en plus de fournisseurs choisissent d’être pro-actifs en stimulant et en coopérant avec les chercheurs de vulnérabilités :

  • soit en misant sur les ressources et expertises en interne.
  • soit en contractant directement avec des chercheurs externes
  • soit en passant par une plateforme qui va mettre en relation des chercheurs et l’éditeur de la solution. Ce dernier paiera donc au résultat et pourra choisir différentes formules et options payantes telles que le management de programme voire le patch management si ses ressources en interne ne sont pas suffisantes.

NB : La création et l’instauration dans la durée d’un programme de Bug Bounty sont considérées comme des indicateurs de maturité de la cybergouvernance des éditeurs en matière de vulnérabilité.

Depuis 2013, YesWeHack travaille au développement d’outils qui facilitent grandement la mise en place d’un politique incitative à la divulgation coordonnée de vulnérabilités.

YesWeHack, sa communauté et son écosystème de services permettent aux organisations et aux chercheurs en sécurité informatique de mieux coopérer.

Grâce aux outils développés par YesWeHack, les organisations bénéficiaires peuvent contourner plus aisément les obstacles rencontrés par leur politique de DCV. De plus, les organisations gagnent en notoriété en démontrant leur appétence et leur volonté d’améliorer en continu leurs systèmes.

Bountyfactory.iola première plateforme Européenne de Bug bounty.

Les critères différenciants

  • un recours à des partenaires et prestataires Européens pour des questions de souveraineté.
  • une infrastructure légale et technique qui répond aux exigences de sécurité les plus élevées.
  • la sécurité et la confidentialité des communications basées sur le chiffrement et le respect des normes ISO.
  • une sécurisation des transactions financières entre les organisations et les chercheurs en sécurité.
  • une plateforme de paiement conforme aux dispositifs européens de lutte contre le blanchiment d’argent et contre le financement du terrorisme.
  • un accompagnement tout au long du processus : de la rédaction du programme jusqu’à l’aide aux correctifs.
  • un classement opérationnel des meilleurs chercheurs : Gestion d’une communauté de chercheurs en sécurité.
  • une réactivité qui permet de mobiliser les meilleurs chercheurs en un temps record.
  • une capacité d’organisation de différents types de programmes de bug Bounty (Privé / public / In situ / Hardware et/ou Software).

Pour vous inscrire c’est par là >

Quelle démarche adopter si un produit ne propose ni Bug Bounty ni Security.txt ?

Un outil simple et efficace pour éviter les remontées sauvages de vulnérabilités.

Il est important de noter que certains produits (logiciel ou physique) ne disposent pas de leur propre programme de Bug Bounty. Il est ainsi délicat pour un chercheur en sécurité de pouvoir remonter une vulnérabilité à une société éditrice. Tous les pays ne disposent pas d’une loi permettant ce type de pratique comme c’est l’objet de l’article 47 de la Loi pour une République numérique initiée par l’ANSSI.

YesWeHack a crée pour faciliter les remontées de vulnérabilités de façon sécurisée voire anonyme et ainsi mettre en relation les différents acteurs œuvrant pour un Internet plus sûr.

Grâce à Zerodisclo plusieurs obstacles sont levés : pas de login, anonymisation du rapport via le réseau Tor (.onion) et chiffrement obligatoire et automatique du contenu du rapport avec la clef PGP publique du CERT choisi.

La liste des CERTs inclus dans

A titre d’exemple : vous pouvez rapporter directement au CERT FR en cliquant sur le lien suivant >

Ci-dessous une infographie qui résume le processus :


Cybersecurity & Bug Bounty: Attack is the best form of defense

uillaume Vassault-Houlière President of Yes We HackBy Guillaume Vassault-Houlière | CEO of YesWeHack

Through our European platform, Bug Bounty is gaining respectability in France and Europe.

Bug Bounty is an innovative and operational practice from the United States that rewards security experts who find security flaws in IT systems.

Within a complex geopolitical context, Europe and France can compete in defending a European model of digital sovereignty.

In the light of new threats and given reports of organizations that are victims of piracy and irreversible damage, some innovative cyber security policies and approaches need to be adopted.

Cybersecurity is a powerful ally for leading digital transformation.

Like the United States, France and Europe must capitalize on the IT security talents of the European zone for those are the talents who will consolidate the digital fortresses of tomorrow.

Today, thanks to, the first European Bug Bounty platform developed by YesWeHack, organizations have an additional tool in their defensive arsenal. Based on a community of more than 3,000 IT security researchers, organizations can significantly increase the security degree of their information systems.

Commonly, organizations are used to planning audits or penetration tests led by a limited number of IT experts during a restricted time window. Although this kind of audit is recommended, it is far from sufficient for protecting information assets.

Keep in mind that cyber criminals do not ask for clearance to damage one targeted infrastructure.

Through a Bug Bounty program, an organization can thus simulate the real conditions of an attack while imposing IT researchers a legal framework. is the appropriate tool to harden information systems and build a relationship of trust between organizations and the IT security experts., with the striking force of our community, allows any type of organization to test a web site, a mobile application, web services, connected things or embedded systems in order to reduce risks and increase data protection.

As soon as a vulnerability is discovered, the expert reports in details to the initiator of the program. Once the reported vulnerability has been confirmed and validated, the organization can fix the issue and can ideally reward the expert.

In the framework of a Bug Bounty program, the organization only pays for the result and the more critical the flaw, the higher the reward. provides its clients with total control over the entire process: control over the scope, rules, budget, accreditation of experts and, of course, the program can be stopped at any time.

Bug Bounty programs constructively increase developers’ skills.

Furthermore, thanks to Bug Bounty Practice, one organization can communicate positively on its capacity to keep the best level of security, as demonstrated by the US Army and Pentagon in 2016. assists you in the creation of totally private or public Bug Bounty programs. We count among our clients, which we can mention, companies such as Orange, OVH, Qwant or ERCOM.


Confronting reality is the duty of every IT security professional

Interview of Stéphane Bourou | Technical Project Manager at Ercom

For 30 years, Ercom has developed a leadership position in the communications, data and terminal security markets.
This position is based on complementary technological expertise in Telco/cloud infrastructure, cryptography and software and on shared values: innovation, expertise, commitment and confidentiality.

Our products and expertise are recognized in France and internationally by major companies, customers, partners and certification entities.

All our solutions are certified or in the process of certification by ANSSI.

Two examples that illustrate Ercom’s expertise:

  • Ercom equipped the Presidential aircraft with a secure telephone in 2002, thus offering the first highly secure mobile communication solution.
  • Ercom’s Cryptosmart (secure communications and mobile terminals) is the first ANSSI-certified solution to be restricted for distribution to consumer terminals, facilitating users to adopt it.

Our offer is based on three products : CryptoPass, CryptoSmart and CryptoBox.

What did you learn from the private phase of your bug bounty program?
The Bug Bounty in general complements the ANSSI certifications to which we submit each of our security solutions.
Our primary goal was to confront our CryptoBox solution with a relevant range of attackers who we might encounter during its use, in order to have a continuous evaluation of the level of resistance of our solution.

Several bug reports were provided to us and one in particular proved out to be a significant level. This enabled us to improve our product and demonstrate the thoroughness of our development teams about security.

Why going public is a good move ?
Private mode limits the number of bug bounty hunters therefore, it does not really confront us with what we would definitely encounter during an operational deployment. By Going Public, we expect to have Bug Bounty Hunters with more focused, varied and specialized skills on specific surfaces, such as web and smart-phone applications. Through this important and true exercise, we will be able to increase the level of assurance obtained during the private phase.

What would be your arguments for convincing reluctant organizations to cross the threshold ?
It’s always good to face reality, and this is especially important for a security solution. We are making the effort to use the Bug Bounty with the dual objective of improving our solution and having greater visibility and credibility. A Bug Bounty program makes it possible to mobilize a large number of IT security researchers for a limited period of time in an economical and repetitive way.
Our experience being very positive, we will soon open a second program for our new product : CryptoPass.

Join the hunt on ! & to harden companies’ systems‘s Security & Privacy Fund is now real and it aims at hardening companies’ systems through our !

Qwant has always believed that the development of online services should be done with maximum protection of the confidentiality of users personal data. That is why Qwant took a “privacy by design” and a “data minimization” approach from day one, which requires to think preventively of the technical means and business models that generate as little risks as possible for the privacy of users.

Since 2014, thanks to YesWeHack founders, Qwant has created its bug bounty program.

Each year Qwant offers bounties to the vulnerabilities hunters gathered at La Nuit du Hack, in Paris. Those programs run by HackerzVoice & YesWeHack teams have significantly helped Qwant to build up skills, and to even better protect their users personal data.

And for the 15th edition of La Nuit du Hack, Qwant wants to offer other startups and organizations – thanks to its fund – the opportunity to challenge and increase the security of their services with the best hackers in Europe and in the world, to improve privacy on the Internet.

Qwant grants 10,000 euros to this fund, that will allow to pay bounties to hackers who will discover vulnerabilities on the services of startups or associations that share Qwant’s ethical values.

Organizations that are selected to benefit from this fund will of course be accompanied to put the bug bounty program together.

You can find all the necessary details to apply for this Privacy & Security Fund at the operation’s official website:

Shall We Play A Game ? Yes We Shall ⠵

Yes We Hack is proud to be platinium Sponsor for the 15th “la Nuit du Hack” next June 24 & 25 \o/

The forthcoming Nuit Du Hack is about to gather more than 2000 people from all over Europe !

Check the schedule !

☠ ☠ ☠

A bit of History :

Originally, la Nuit du Hack was created by Paulo Pinto aKa CrashFR.

“La Nuit Du Hack” is one of the oldest French underground hackers’ event which bring together, professionals and amateurs of any skill level, around lectures and challenges.

At the very beginning of la Nuit du Hack in 2003, the budget was lower than 1 k€.

Started with 20 persons, the event never stopped growing up by gathering more and more people from amateurs to professionals.

Now, it has reached 170 k€ thanks to the HackerzVoice Team, Géraldine and almost 100 volunteers 🙂

Since the very beginning in 2003, YesWeHack founders have been working tightly with Hackerzvoice for organizing La Nuit du Hack.

In 2011, it saw several international renowned speakers and gripped more than 950 guests including more than 50 challengers. During this edition we had the privilege to host world-famous speakers.

In 2014, organized its first bug bounty in the framework of la NDH. At that time, a prototype of was used to manage bug bounty programmes.

At that period of time the founders of YesWeHack were part of the Jury 🙂 please appreciate the picture below !

For that 2014 and 2015 editions, the rewards were, let’s say, exotic : Real Bounty Chocolate Bars and actually reward checks were signed on stage by Guillaume Vassault-Houlière aka Free_Man (President of HackerzVoice & YesWeHack CEO).

Each year, a common pot is set up to pay the bounties and if there is any money left then it is donated to the association HackerzVoice.

2015 was the year of Skyrock, Denyall, Qwant underwent all together bug bounty programmes .

2016 was a landmark for YesWeHack for it was the first time la NDH Bug Bounty programmes were handled by an official version of !

On that occasion, fees were disabled especially for the event and the dedicated bug bounty programmes namely the ones of / / Orange / Protektoid were physically restricted to NDH attendees located in Disney’s scope and as usual managed by HackerzVoice . Meanwhile, the Jury was strengthened by recruiting a new member : Mr. Skunk !

2017 is a special edition of la NDH and as platinium sponsor, YesWeHack Team is willing to make things bigger for the sake of game and fun !

On the occasion of the 15th edition of la Nuit Du Hack, There will be about 10 bug bounty programmes restricted to ‘la Nuit du Hack’ attendees.

Only attendees inside DisneyLand will be allowed to play. Don’t forget to register on

Stay Tuned !

For duplicates, we planned everything if you wanna cry :P

For duplicates, we planned everything if you wanna cry 😛

 ☠ ☠ ☠

YesWeHack also provides a dedicated HackDating Zone for recruiters to spot talents during la Nuit du Hack !

Recruiting entities are :

  • Ministère de la Défense (France)
  • Orange Cyberdefence
  • Synaktiv
  • Sysdream
  • Sogeti
  • Outscale
  • Digital Security
  • Vade Secure
  • OVH
  • Qwant
  • Airbus
  • DoctoLib

So, post your CV on !

 ☠ ☠ ☠

La Nuit du Hack is a unique event where curious people have fun, no matter their skills are !

HackerzVoice Will Never Die !

☠ ☠ ☠

Edouard Camoin, CISO of, on the bug bounty switching process from private to public status

Edouard Camoin, CISO of Outscale.

– What’s your role as CISO within Outscale?

First of all, Outscale deals with IaaS : like AWS we provide API and we have Branch offices in France, USA and China. Each Branch office is subject to a specific digital sovereignty.

I’ve been wearing two hats : Guarantor of the internal security and guarantor of the security for the customers.
Globally speaking the human resources are at the core of my job.

– What was the need assessment that led to the opening of a bug bounty program?

We provide cloud computing services with certification 27001.

Regularly, we order pentesting sessions led by IT security companies. The results are pretty good but that did not satisfy us enough and we wanted to go deeper to better secure our products.

We made up our mind to expanse our culture in terms of security. Clearly, bug bounty is another approach because the payment is bound to the result, only the result counts, and bug bounty is not limited in time.

– Why did you opt for BountyFactory and more precisely, what criteria convinced you compared to other US and European platforms?

We needed a platform based in France and so in Europe strictly because it was a strong demand on the behalf of our management because we are very sharp on the sovereignty of the data.

So de facto, the US platforms have been disqualified.

BountyFactory offers much better responsiveness with the integration of features within the platform and the process of creating the program is clear. We were seduced and convinced by the high quality of the responsiveness and relevance of the YesWeHack team.

– Did you ask for assistance in setting up your program?

BountyFactory provides a real and efficient support and follow-up.

As a matter of fact, we managed to publish our program in just a single day!

I was sent an example of a program and in no time I was able to finalize, define our scope properly. Last step was the adjusting of the overall amount for the rewards.

– For the private step how many hunters did you select?

From the hall of fame, I just selected the hunters that I knew of reputation (5 or 8) and completed with some of the yeswehack private team.

– During the private program what did you notice in terms of reporting of vulnerabilities?

Indeed, we had two private programs.
One focused on our IaaS and Api and the other one focused on our web application .

As for our Web interface : we’ve got 10 reported bugs in one month, and 5 were validated. Only 3 of them were critical.
Concerning our API : nothing critical so far .

– Have you enjoyed the quality of communication between you and the hunters via the Bountyfactory platform? What improvement would you need?

The ticketing system via email is ok beyond that, we often discuss with hunters via twitter and more generally via the famous IRC so it would be a good idea to have a secure and built-in Instant messaging feature.
The hunters are very correct, they ask before attacking. The level of discussion and consultation is really good, prevention upstream before testing the perimeter because the platform was in production. They are careful and responsible, they want to have the customer’s approval before trying various methods.

– Why did you decide to go public?

First beginning by a Private program was highly needed for we had no experience in managing a bug bounty program.
The private step has a clear advantage : a private bug bounty is like a pentest without time limit.
Going Public will allow us to test in real conditions our IaaS + Api.
This first pass throughout the private mode is important to lucidly approach the switching from private to public status.
Now we are glad to announce : Everyone can play !

The real attacker does not care about standards so only Bug Bounty can simulate this brutal truth !

– In short, are you satisfied with your choice?

Bug Bounty is really appreciated in communities, we wanted to set an example, in our humble opinion, the pentesting will have to question itself. The Hunter is involved in bug bounty to find. Unfortunately, no normative aspects (PASSI) look at the benefits and we can confirm that the real attacker does not care about standards so only bug bounty can simulate this brutal truth !
With our customers, we will promote this exercise widely via twitter, and moreover our security approach via bug bounty will be explained to our partners and customers in the forthcoming appointments.


The Hunt is ON !

Outscale Bug Bounty Program


Xavier Leune, CCM Benchmark Group, on the benefits of bug bounty

Xavier Leune - CCM Benchmarck group -

Xavier Leune – CCM Benchmarck group –

What is your role in CCM benchmark ?
I am deputy CTO and i’m in charge of technical monitoring with Damien Mangin, CTO of CCM Benchmark Group.

What were the reflexion and the needs assesment that brought about a bug bounty program ?
Like any other actor on the Internet, we are experiencing increasing threats like hacking tries or malware targeting our platforms. As we are the first French leaders media company (according to Comscore), we are particularly exposed to cyber threats. Therefore, we are meant to have a proactive approach in terms of security in order to protect our users’ data.
The bug bounty Program we opened was a very important step complementary of others methods we set up (pentests, trainings). In terms of security by design, this exercise is really useful for our devs because thanks to the bug reporting they can improve the degree of security of their own code.

Why did you guys choose Bounty Factory : What made the difference compared to other bug bounty platforms ?
We paid attention to several criteria provided by First advantage was the fact that it is based in France and it strongly facilitated the set up because we had a good feeling throughout the discussion with YesWehack teams. They did prove their capacity in mobilizing some high-level hunters for a program such as ours. Eventually, The European approach and the way the rewards are run were both arguments that can assure us to fight against the financing of terrorism.

Did you ask for an help for setting up of your program (in terms of scope, timing, invitations) ?
Since the launching of our bug bounty program on the 28th of September, we’ve been helped by Bounty Factory dedicated Team from the very beginning and on the regular basis. We did profit from their experiences in order to better write up our program and better define our scope so that hunter were precisely informed of our expectations. Moreover, we have been accompanied to define our rewarding policy to treat properly the feedback given by hunters who are spending long time for securing our platforms.
Last but not least, we benefited from Bounty Factory dedicated team in order to select and send invitations to high-ranked hunters.

How many hunters did you invite for the private step ?
For the private step we have invited the whole YesWehack private team made of 10 people.

During the private time, what did you notice out in terms of reported vulnerabilities ?
Obviously at the very beginning of the program simple and common vulnerabilities were reported, especially XSS vulnerabilities. As time went by, more sophisticated vulnerabilities appeared , we were really surprised by some findings. We have felt a very good implication on the behalf of each hunter who was driven by their appetite for being the first reporting a critical vulnerability.
The features : 58 reported bugs, 34 were subject to corrective measures. Others were mainly duplicates 18 out of 24.
The number of critical vulnerabilities were up to 5.
The best reward  for one and only bug was up to 1000 €.

Did you appreciate the level of communication between you and the hunters ?
The level of communication with the hunters was really appreciated by our team. At times, we experienced some difficulties concerning some vulnerabilities in reproducing them or understanding the prejudice they implied. So the hunters were really good at answering our questions and at double-checking the patches we delivered.

Why did you choose to go public ?
To us, going public is a natural evolution of our bug bounty program. We wanted to be able to understand correctly the art of running a bug bounty through especially by dealing with a restricted number of reported bugs in a first movement and along with hunters whom we wanted to communicate with. Now, we are far more confident in terms of procedures and in terms of patching policy, so it makes sense going public and being exposed to a max of skills to keep on securing our platform .

In terms of profits, can you say that beyond the financial aspect there are issues of communication and reputation ? How would CCM deal with these aspects ?
It is important for us to show a proactive approach on such crucial issues. However, it is not planned at the moment to promote the opening of our bounty bug program towards our audience. Above all, we decided to go public for ourselves and our visitors.


So, Hunters 

Hack and take the cash

via BountyFactory


Portrait of a hunter : Ylujion

ylujionYesWeHack is glad to introduce you to its best hunters performing on

This week, it’s @Ylujion‘s turn, Check his portrait below !


  1. How old are you  ?
    I’m 32
  1. Where does your nickname come from ?
    The reason why i’ve chosen Ylujion as nickname is really simple : i wanted to invent a genuine nickname that does not exist on the Internet to see how it will propagate through search engines as i started posting on twitter and co. Generally speaking, i am told that my nickname is shitty 🙂 and i do agree somehow ! … Apart from that, the correct way of pronouncing “Ylujion” is like the way you pronounce the English word “illusion”. This kind of phonetic trick amuses me 🙂
  1. How long have you been hunting ?
    I have been hunting for more than one year.
  1. How did you discover bug bounty hunting ?
    Thanks to a friend who told me to test different bug bounty platforms.
  1. When do you spend most of your time hunting bugs ?
    Mainly during the night and the week-end, sometimes at lunch break when i am at work.
  1. As a Bug Bounty hunter, What are you driven by ?
    What i do appreciate in Bug Bounty is the diversity of scopes and technologies. It enables you to test up-to-date technologies by the prism of information security. Above all, there is a sort of freedom of action, you can go hunting whenever you want, from wherever you are, without being under pressure. Last but not least, you can earn money if you get good results.
    I often do recommend beginners interested by pentesting to dive into bug bounty platforms as a training discipline. It enables you to increase your skills in information security with real targets but within a full legal framework !
  1. Can you tell us one funny story about Bug Bounty Hunting ? (epic win and/or fail)
    I had spent more than 20 hours on exploiting one vulnerability in the scope of a rather famous startup’s program. Thanks to this vulnerability, i gained access to almost the entire information system so i decided to submit a report. Meanwhile, i was excited in terms of reward : usually this kind of vulnerability can be rewarded between 1,000$ & 10,000$ !
    Eventually, i won a  t-shirt ^^
    Driven by excitement and performance, i forgot the program clearly mentioned there was no reward but only gifts 🙂 too bad !
  1. What’s the best reward for one vulnerability you got thanks to Bounty Factory ?
      5 000 € (Ed.

Ylujion’s total rewards for December reached 15 000 €

  1. To you, What are the benefits of  Bug Bounty compared to pentesting?
    For a company, a bug bounty program enables you to test without time restriction moreover your system will be tested by various and numerous hunters. The company can also define the different level of reward and thus know the required budget to have a successful bug bounty program. Beyond that, it does not replace a traditional and classical pentest.
  1. What’s your favorite language ?
  1. What’s your favorite OS  ?
    Arch Linux but i guess there is no relation between this OS and bug hunting
  1. Beyond bugbounty, what are your hobbies ?
    I am really good at drinking, eating and sleeping of course 🙂


follow @Ylujion on twitter !


Come on and play on

YesWeHack winner of the Jury’s Favorite Prize #FIC2017,C59984,I59984.htm?KM_Session=15efbfef1e084b087bdc5a5e39919cdb

YesWeHack Team is honored to have received the #FIC2017 Jury’s Favorite Prize

This Jury’s Favorite Prize proves that our products meet the challenges of today: the hiring of talents and the need for agile security. This award will allow us to strengthen our leadership in France and above all to boost us to conquer the Euro zone, that is our priority for 2017 !

Guillaume Vassault-Houlière, Yeswehack CEO


Congratulations to the winners :

  • Prove & Run
  • GateWatcher 


We do thank all members of the Jury

  • François Lavaste, Président CyberSecurity, Airbus Defence and Space
  • Alain Bouillé, RSSI, Caisse des Dépôts et Président du CESIN (Club des experts de la sécurité de l’information et du numérique)
  • Gilles Daguet, General Partner, ACE Management
  • Thierry Delville, Inspecteur général de la Police nationale, Délégation ministérielle aux industries de sécurité
  • Laurent Dumas Crouzillac, Associé, CapHorn Invest
  • Thomas Fillaud, Chef de bureau, Politique industrielle et Assistance (PSS), ANSSI
  • Philippe Gaillard, Associé, CyberD Capital
  • Joseph Graceffa, R&D-SSI, CLUSIR Nord de France
  • Jacques Hébrard, Commandant, Région gendarmerie Hauts de France
  • Geoffroy Hermann, Chef du bureau Réseaux & Sécurité, DGE
  • Jacques-Benoît Le Bris, DSI, Solvay
  • Olivier Ligneul, RSSI, Groupe EDF
  • Thierry Olivier, RSSI, Société Générale
  • Frédéric Valette, Responsable du pôle SSI, Direction générale de l’armement, Ministère de la Défense
  • Yves Veret, Senior Advisor Sécurité Numérique & Technologie de l’information CALAO Finance


For those who do not know the FIC aka International Cybersecurity Forum (Hosted in Lille – France)

The International Cybersecurity Forum is a platform aiming at promoting a pan-european vision of cybersecurity as well as to strengthen the fight against cybercrime.

In order to do so, the FIC relies on :

• The trade show, to share knowledge and ideas, recruit new employees and maintain contacts
• The forum, to discuss and debate with experts, to gather ideas and to share professional lessons
• The Observatory, to continue exchanging views and information after the FIC, to explore topics in greater depth and to consolidate our network of experts and like minded throughout the year


See you soon #FIC2017 !



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