avatar
Bug bounty
Public

ownCloud - Bug Bounty Program

ownCloud GmbH is the company behind the ownCloud Project - the most downloaded open source project for data and file sync, share and view.

Reward

Bounty
Hall of fame
$50
Low
$50
Medium
$500
High
$2,000
Critical
$5,000

Program

Avg reward
-
Max reward
-
Scopes
18

Supported languages
English

Hacktivity

Reports
50
1st response
< 1 day
Reports last 24h
1
Reports last week
1
Reports this month
4

About

ownCloud

We created the ownCloud Security Bug Bounty Program to reward security researchers for finding issues in the ownCloud Server, and in so doing help strengthen ownCloud Server for customers, users and the community.

Program Rules

Testing Policy and Responsible Disclosure

Please adhere to the following rules while performing research on this program:

  • Denial of service (DoS) attacks on ownCloud applications, servers, networks or infrastructure are strictly forbidden.
  • Avoid tests that could cause degradation or interruption of our services.
  • Do not use automated scanners or tools that generate large amount of network traffic.
  • Do not leak, manipulate, or destroy any user data or files in any of our applications/servers.
  • Do not copy any files from our applications/servers and disclose them.
  • No vulnerability disclosure, full, partial or otherwise, is allowed.

Reward Eligibility

We are happy to thank everyone who submits valid reports which help us improve the security of ownCloud, however only those that meet the following eligibility requirements may receive a monetary reward:

  • You must be the first reporter of a vulnerability.
  • The vulnerability must be a qualifying vulnerability (see below).
  • The report must contain the following elements:
    • Clear textual description of the vulnerability, how it can be exploited, the security impact it has on the application, its users and ownCloud, and remediation advice on fixing the vulnerability
    • Proof of exploitation: screenshots demonstrating the exploit was performed, and showing the final impact
    • Provide complete steps with the necessary information to reproduce the exploit, including (if necessary) code snippets, payloads, commands etc
  • You must not break any of the testing policy rules listed above
  • You must not be a former or current employee of ownCloud or one of its contractors.

Reward amounts are based on:

  • Reward grid of the report's scope
  • CVSS scoring and actual business impact of the vulnerability upon performing risk analysis

If the bug is identified as meaningful and qualifies for the program, and the reporter has followed the Disclosure Policy, the bug bounty is paid out on the following schedule by bug severity:

Impact Definition Reward
Critical Gaining remote code execution on the server as a non-admin user. (i.e. RCE) $2000 - $5000
High Gaining access to complete user data of any other user. (i.e. Auth Bypass) or SQL Injection with critical effects $500 - $2000
Medium Allowing the adversary to gain complete control over a single user session. (Stored XSS with CSP bypass / Critical CSRF / …) $50 - $500
Low Vulnerabilities that can only be exploited in very rare cases or have marginal impact. (High amount of unlikely user interaction / …) $50

The severity of the bug is determined at the discretion of ownCloud and the ownCloud security team.
All bounties will be paid using YesWeHack platform.

Complements about our scopes

Desktop Client

Note that the ownCloud server itself is considered a trusted endpoint in our threat model and an eligible vulnerability must not rely on a malicious ownCloud instance.

com.owncloud.android

Note that the ownCloud server itself is considered a trusted endpoint in our threat model and an eligible vulnerability must not rely on a malicious ownCloud instance.

owncloud.iosapp

Note that the ownCloud server itself is considered a trusted endpoint in our threat model and an eligible vulnerability must not rely on a malicious ownCloud instance.

owncloud/customgroups

  • Code from: https://github.com/owncloud/customgroups
    This apps makes it possible for users to create their own custom groups and manage members. It is then possible to share files or folders with these groups.

owncloud/guests

  • Code from: https://github.com/owncloud/guests
    Create a guest user by typing his name in to the sharing dialog. The guest will receive an email invite with a link to create an account. He only has access to files which are shared with him.

owncloud/richdocuments

  • Code from: https://github.com/owncloud/richdocuments
    Collabora Online for ownCloud provides collaborating editing functions for text documents, spreadsheets and presentations inside ownCloud for improved productivity.

owncloud/notifications

Notification backend and UI for the notification panel/icon. Used for notifications of other apps (announcementcenter, federatedfilesharing etc.)

owncloud/core

This is our core server software, which is "the heart" of owncloud.
Note that some folders such as tests and so on will not be packaged. Please make sure that the referenced file is thus also existent in our final releases.

owncloud/gallery

Media gallery for ownCloud which includes previews for all media types supported by your installation.
Provides a dedicated view of all images in a grid, adds image viewing capabilities to the files app and adds a gallery view to public links.

owncloud/ocis

This is next generation server software, which is "the new heart" of owncloud.
Note that some folders such as tests and so on will not be packaged. Please make sure that the referenced file is thus also existent in our final releases.

owncloud/user_ldap

This application enables administrators to connect ownCloud to an LDAP-based user directory for authentication and provisioning users, groups and user attributes. Admins can configure this application to connect to one or more LDAP directories or Active Directories via an LDAP interface. Attributes such as user quota, email, avatar pictures, group memberships and more can be pulled into ownCloud from a directory with the appropriate queries and filters.

owncloud/oauth2

Application for using OAuth 2.0 in ownCloud

owncloud/activity

Provides an activity feed showing your file changes and other interesting things going on in your ownCloud.

owncloud/updater

owncloud/files


Reward

Asset value CVSS
Low
CVSS
Medium
CVSS
High
CVSS
Critical
Critical
$50$500$2,000$5,000

Scopes

ScopeTypeAsset value
https://owncloud.org/install/#install-clients application
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://play.google.com/store/apps/details?id=com.owncloud.android mobile-application-android
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://apps.apple.com/app/id1359583808 mobile-application-ios
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://github.com/owncloud/customgroups other
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://github.com/owncloud/guests other
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://github.com/owncloud/richdocuments other
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://github.com/owncloud/notifications other
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://github.com/owncloud/client other
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://github.com/owncloud/core other
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://github.com/owncloud/gallery other
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://github.com/owncloud/ocis other
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://github.com/owncloud/user_ldap other
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://github.com/owncloud/oauth2 other
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://github.com/owncloud/activity other
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://github.com/owncloud/updater other
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://github.com/owncloud/core/tree/master/apps/files other
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://github.com/owncloud/android other
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000
https://github.com/owncloud/ios-app other
Critical
Low
$50
Medium
$500
High
$2,000
Critical
$5,000

Out of scopes

  • All domains or subdomains not listed in the above list of 'Scopes'
  • *.owncloud.org
  • *.owncloud.com

Vulnerability types

Qualifying vulnerabilities

  • SQL Injection (SQLi)
  • Cross-Site Scripting (XSS)
  • Remote Code Execution (RCE)
  • Insecure Direct Object Reference (IDOR)
  • Horizontal and vertical privilege escalation
  • Authentication bypass & broken authentication
  • Business Logic Errors vulnerability with real security impact
  • Local files access and manipulation (LFI, RFI, XXE, SSRF, XSPA)
  • Cross-Origin Resource Sharing (CORS) with real security impact
  • Cross-site Request Forgery (CSRF) with real security impact
  • Open Redirect

Non-qualifying vulnerabilities

  • Tabnabbing
  • Missing cookie flags
  • Content/Text injections
  • Mixed content warnings
  • Clickjacking/UI redressing
  • Denial of Service (DoS) attacks
  • Known CVEs without working PoC
  • Open ports without real security impact
  • Social engineering of staff or contractors
  • Presence of autocomplete attribute on web forms
  • Vulnerabilities affecting outdated browsers or platforms
  • Self-XSS or XSS that cannot be used to impact other users
  • Outdated libraries without a demonstrated security impact
  • Any hypothetical flaw or best practices without exploitable PoC
  • Expired certificate, best practices and other related issues for TLS/SSL certificates
  • Unexploitable vulnerabilities (ex: XSS or Open Redirect in HTTP Host Header)
  • Reports with attack scenarios requiring MITM or physical access to victim's device
  • Missing security-related HTTP headers which do not lead directly to a vulnerability
  • Unauthenticated / Logout / Login and other low-severity Cross-Site Request Forgery (CSRF)
  • Invalid or missing SPF (Sender Policy Framework), DKIM, DMARC records
  • Session expiration policies (no automatic logout, invalidation after a certain time or after a password change)
  • Disclosure of information without direct security impact (e.g. stack traces, path disclosure, directory listings, software versions, IP disclosure, 3rd party secrets)
  • CSV injection
  • HTTP Strict Transport Security Header (HSTS)
  • Subdomain takeover without a full working PoC
  • Blind SSRF without direct impact (e.g. DNS pingback)
  • Lack of rate-limiting, brute-forcing or captcha issues
  • User enumeration (email, alias, GUID, phone number)
  • Password requirements policies (length / complexity / reuse)
  • Ability to spam users (email / SMS / direct messages flooding)
  • Disclosed / misconfigured Google API key (including Google Maps)
  • Recently disclosed 0-day vulnerabilities (less than 180 days since patch release)
  • Password reset token leak on trusted third-party website via Referer header (eg Google Analytics, Facebook…)

Hunting requirements

Account access

No test accounts will be provided.

User agent

Please append to your user-agent header the following value: ' -BugBounty-owncloud-31337 '.


Hunters collaboration

When submitting new report, you can add up to 5 collaborators, and define the reward split ratio.

For more information, see help center.
Note: For reports that have already been rewarded, it is not possible to redistribute the rewards.