Jenkins GitHub Branch Source Plugin POST Request cross-site request forgery

Summaryinfo

A vulnerability was found in Jenkins. It has been classified as problematic. The impacted element is an unknown function of the component GitHub Branch Source Plugin. This manipulation as part of POST Request causes cross-site request forgery. This vulnerability is registered as CVE-2017-1000091. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in Jenkins (Continuous Integration Software) (unknown version) and classified as problematic. Affected by this vulnerability is an unknown code block of the component GitHub Branch Source Plugin. The manipulation as part of a POST Request leads to a cross-site request forgery vulnerability. The CWE definition for the vulnerability is CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. As an impact it is known to affect integrity. The summary by CVE is:

GitHub Branch Source Plugin connects to a user-specified GitHub API URL (e.g. GitHub Enterprise) as part of form validation and completion (e.g. to verify Scan Credentials are correct). This functionality improperly checked permissions, allowing any user with Overall/Read access to Jenkins to connect to any web server and send credentials with a known ID, thereby possibly capturing them. Additionally, this functionality did not require POST requests be used, thereby allowing the above to be performed without direct access to Jenkins via Cross-Site Request Forgery.

The bug was discovered 07/10/2017. The weakness was published 10/05/2017 (Website). It is possible to read the advisory at jenkins.io. This vulnerability is known as CVE-2017-1000091 since 07/13/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 86 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Similar entries are available at VDB-107448, VDB-107449, VDB-107450 and VDB-107451. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Continuous Integration Software

Name

• Jenkins

License

• open-source

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Be aware that VulDB is the high quality source for vulnerability data.

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