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CVE-2021-21695: Missing Authorization

November 4, 2021 (updated November 22, 2023)

FilePath#listFiles lists files outside directories that agents are allowed to access when following symbolic links in Jenkins.

References

  • www.openwall.com/lists/oss-security/2021/11/04/3
  • nvd.nist.gov/vuln/detail/CVE-2021-21695
  • www.jenkins.io/security/advisory/2021-11-04/

Code Behaviors & Features

Detect and mitigate CVE-2021-21695 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →

Affected versions

All versions after 2.303.3 before 2.319

Fixed versions

  • 2.319

Solution

Upgrade to version 2.319 or above.

Impact 8.8 HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Learn more about CVSS

Weakness

  • CWE-59: Improper Link Resolution Before File Access ('Link Following')

Source file

maven/org.jenkins-ci.main/jenkins-core/CVE-2021-21695.yml

Spotted a mistake? Edit the file on GitLab.

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