CVE-2021-21687

Description

Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not check agent-to-controller access to create symbolic links when unarchiving a symbolic link in FilePath#untar.

CVSS Metrics

• v3.1•CRITICAL•Score: 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
• v3.1•CRITICAL•Score: 9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
• v2.0•MEDIUM•Score: 6.4AV:N/AC:L/Au:N/C:P/I:P/A:N

EPSS Trends

Current EPSS score: 0.27%• Percentile: 51%

Techniques & Countermeasures

• CWE-862•Missing Authorization

  The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Affected Systems

• jenkins project•jenkins

  ≥ unspecified, ≤ 2.318 | ≥ unspecified, ≤ LTS 2.303.2

• Unknown•Jenkins

  < 2.303.3 | < 2.319

• org.jenkins-ci.main•jenkins-core

  < 2.303.3 | ≥ 2.304, < 2.319

References (3)

• https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455
• https://nvd.nist.gov/vuln/detail/CVE-2021-21687
• https://github.com/jenkinsci/jenkins