CVE-2021-21696
Last modified
CVE-2021-21696 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 2.32% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Jenkins | Jenkins | <= 2.303.2 |
| Jenkins | Jenkins | <= 2.318 |
References
- http://www.openwall.com/lists/oss-security/2021/11/04/3Mailing List, Third Party Advisory
- https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2423Mitigation, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2021/11/04/3Mailing List, Third Party Advisory
- https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2423Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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