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.
Remediation
References
http://www.openwall.com/lists/oss-security/2021/11/04/3
https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2423
Related Vulnerabilities
CVE-2020-15095 Vulnerability in maven package org.webjars.npm:npm
CVE-2019-17573 Vulnerability in maven package org.apache.cxf:cxf-rt-transports-http
CVE-2019-16564 Vulnerability in maven package com.paul8620.jenkins.plugins:pipeline-aggregator-view