CVE-2021-21683: Path Traversal
First published: Wed Oct 06 2021(Updated: )
The file browser for workspaces, archived artifacts, and `userContent/` in Jenkins 2.314 and earlier, LTS 2.303.1 and earlier may interpret some paths to files as absolute on Windows. This results in a path traversal vulnerability allowing attackers with Overall/Read permission (Windows controller) or Job/Workspace permission (Windows agents) to obtain the contents of arbitrary files.\n\nThe file browser in Jenkins 2.315, LTS 2.303.2 refuses to serve files that would be considered absolute paths.
Credit: jenkinsci-cert@googlegroups.com jenkinsci-cert@googlegroups.com jenkinsci-cert@googlegroups.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Jenkins Jenkins | <=2.303.1 | |
| Jenkins Jenkins | <=2.314 | |
| Microsoft Windows | ||
| maven/org.jenkins-ci.main:jenkins-core | >=2.304<=2.314 | 2.315 |
| maven/org.jenkins-ci.main:jenkins-core | <=2.303.1 | 2.303.2 |
| All of | ||
| Any of | ||
| Jenkins Jenkins | <=2.303.1 | |
| Jenkins Jenkins | <=2.314 | |
| Microsoft Windows |
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Reference Links
- http://www.openwall.com/lists/oss-security/2021/10/06/1
- https://www.jenkins.io/security/advisory/2021-10-06/#SECURITY-2481
- https://nvd.nist.gov/vuln/detail/CVE-2021-21683
- https://github.com/jenkinsci/jenkins/commit/3f679fc12d073676a4441d3fa8b5fff34c07662f
- https://github.com/advisories/GHSA-4pw5-r58h-fv24 (Advisory)
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2021-21683.
What is the severity of CVE-2021-21683?
The severity of CVE-2021-21683 is medium with a CVSS score of 6.5.
What is the affected software?
The affected software is Jenkins versions 2.314 and earlier, LTS 2.313.1 and earlier.
What is the CWE ID?
The CWE ID for CVE-2021-21683 is CWE-22.
How can attackers exploit this vulnerability?
Attackers with Overall/Read permission (Windows controller) or Job/Workspace permission (Windows agents) can exploit this vulnerability to obtain unauthorized access to files.
- collector/nvd-index
- collector/nvd-api
- collector/github-advisory-latest
- alias/GHSA-4pw5-r58h-fv24
- alias/CVE-2021-21683
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- collector/github-advisory
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- agent/event
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- agent/trending
- vendor/jenkins
- canonical/jenkins jenkins
- version/jenkins jenkins/2.303.1
- version/jenkins jenkins/2.314
- vendor/microsoft
- canonical/microsoft windows
- package-manager/maven