by Kastro
Paper/Archive/CVE-2021-21696

CVE-2021-21696

Jenkins project Jenkins — 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…

EPSS 2%CVSS 9.8
critical.is priorityof 100
46
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 84.0.840 × 2016.8No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Jenkinsunspecified – 2.318–CNA
Jenkinsunspecified – LTS 2.303.2–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

refjenkins.io/security/advisory/2021-11-04/#SECURITY-2423refopenwall.com/lists/oss-security/2021/11/04/3