XXE vulnerability in Jenkins Mercurial Plugin

GHSA-x58r-wxc3-7pqr · CVE-2020-2305

Published May 24, 2022 · Modified Feb 16, 2024

Description

Jenkins Mercurial Plugin prior to 2.12, 2.10.1, 2.9.1, and 2.8.1 does not configure its XML changelog parser to prevent XML external entity (XXE) attacks.

This allows attackers able to control an agent process to have Jenkins parse a crafted changelog file that uses external entities for extraction of secrets from the Jenkins controller or server-side request forgery.

Mercurial Plugin 2.12, 2.10.1, 2.9.1, and 2.8.1 disables external entity resolution for its XML parser.

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2020-2305
WEB https://github.com/jenkinsci/mercurial-plugin/commit/84af58b08f80bb92792f7bc04a31487f3eeee95a
WEB https://github.com/CVEProject/cvelist/blob/381fe967666a5ce01625a7a050427aa4757e3ca6/2020/2xxx/CVE-2020-2305.json
PACKAGE https://github.com/jenkinsci/mercurial-plugin
WEB https://www.jenkins.io/security/advisory/2020-11-04/#SECURITY-2115

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