CVE-2021-21686: Improper Link Resolution Before File Access ('Link Following')

November 4, 2021 (updated November 22, 2023)

File path filters in the agent-to-controller security subsystem of Jenkins do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories.

References

nvd.nist.gov/vuln/detail/CVE-2021-21686
www.jenkins.io/security/advisory/2021-11-04/

Code Behaviors & Features

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