jenkinsci/jenkins · Security
View name validation bypass in Jenkins
- GHSA ID
- GHSA-w2hv-rcqr-2h7r
- CVE ID
- CVE-2021-21640
- Severity
- medium
- Published
- Updated
- CVSS
- 4.3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CVSS v3
- 4.3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Description
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.
CWEs
- CWE-240 · Improper Handling of Inconsistent Structural Elements
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-21640 ↗
- https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1871 ↗
- http://www.openwall.com/lists/oss-security/2021/04/07/2 ↗
- https://github.com/jenkinsci/jenkins/commit/42e2c74049ddf5e0aca1fe6aadc7b24fdabb5494 ↗
- https://github.com/advisories/GHSA-w2hv-rcqr-2h7r ↗