Vulnerability Description
Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not limit agent read/write access to the libs/ directory inside build directories when using the FilePath APIs, allowing attackers in control of agent processes to replace the code of a trusted library with a modified variant. This results in unsandboxed code execution in the Jenkins controller process.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Jenkins | Jenkins | <= 2.303.2 |
References
- http://www.openwall.com/lists/oss-security/2021/11/04/3Mailing ListThird Party Advisory
- https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2423MitigationVendor Advisory
- http://www.openwall.com/lists/oss-security/2021/11/04/3Mailing ListThird Party Advisory
- https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2423MitigationVendor Advisory
FAQ
What is CVE-2021-21696?
CVE-2021-21696 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not limit agent read/write access to the libs/ directory inside build directories when using the FilePath APIs, allowing attackers in control of...
How severe is CVE-2021-21696?
CVE-2021-21696 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-21696?
Check the references section above for vendor advisories and patch information. Affected products include: Jenkins Jenkins.