GHSA-w2hv-rcqr-2h7r

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GHSA-w2hv-rcqr-2h7r

Summary: View name validation bypass in Jenkins

Details: Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not properly check that a newly created view has an allowed name. When a form to create a view is submitted, the name is included twice in the submission. One instance is validated, but the other instance is used to create the value. This allows attackers with View/Create permission to create views with invalid or already-used names. Jenkins 2.287, LTS 2.277.2 uses the same submitted value for validation and view creation.

References: https://nvd.nist.gov/vuln/detail/CVE-2021-21640, https://github.com/jenkinsci/jenkins/commit/42e2c74049ddf5e0aca1fe6aadc7b24fdabb5494, https://github.com/jenkinsci/jenkins, https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1871, http://www.openwall.com/lists/oss-security/2021/04/07/2