PT-2021-5284 · Jenkins · Jenkins

Daniel Beck · Published 2021-11-04 · Updated 2024-03-06 · CVE-2021-21685

Positive Technologies (AI Summary)

CVSS v3.1

9.4

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Jenkins versions 2.318 and earlier Jenkins LTS versions 2.303.2 and earlier

Description The issue is related to a lack of authorization procedure in the Jenkins automation server. This allows a remote attacker to create parent directories in FilePath#mkdirs.

Recommendations For Jenkins versions 2.318 and earlier, consider disabling the FilePath#mkdirs function until a patch is available. For Jenkins LTS versions 2.303.2 and earlier, restrict access to the FilePath#mkdirs function to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

BDU:2021-06110

BIT-JENKINS-2021-21685

CVE-2021-21685

GHSA-58XM-MXJF-254G

RHSA-2021:4799

RHSA-2021:4801

RHSA-2021:4827

RHSA-2021:4829

RHSA-2021:4833

Affected Products

Jenkins

References · 15

• https://osv.dev/vulnerability/GHSA-58xm-mxjf-254g · Vendor Advisory
• https://osv.dev/vulnerability/BIT-jenkins-2021-21685 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-21685 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-06110 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/671859 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-21685 · Security Note
• https://jenkins.io/security/advisory/2021-11-04/#SECURITY-2455 · Vendor Advisory
• https://github.com/jenkinsci/jenkins · Note
• https://github.com/jenkinsci/jenkins/commit/104c751d907919dd53f5090f84d53c671a66457b · Note
• https://github.com/jenkinsci/jenkins/commit/5a245e42979abe4a26d41727c839521e36cedd74 · Note
• https://github.com/jenkinsci/jenkins/commit/63cde2daadc705edf086f2213b48c8c547f98358 · Note
• http://openwall.com/lists/oss-security/2021/11/04/3 · Note
• https://t.me/cibsecurity/31827 · Telegram Post
• https://t.me/cvenotify/22987 · Telegram Post
• https://access.redhat.com/security/cve/cve-2021-21685 · Note