PT-2021-5428 · Jenkins · Jenkins

Daniel Beck · Published 2021-11-04 · Updated 2024-03-06 · CVE-2021-21694

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

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 the absence of an authorization procedure in the Jenkins automation server. This can allow a remote attacker to impact the confidentiality, integrity, and availability of protected information. The FilePath#toURI, FilePath#hasSymlink, FilePath#absolutize, FilePath#isDescendant, and FilePath#get*DiskSpace functions do not check any permissions in the affected Jenkins versions.

Recommendations For Jenkins versions 2.318 and earlier, consider disabling the FilePath#toURI, FilePath#hasSymlink, FilePath#absolutize, FilePath#isDescendant, and FilePath#get*DiskSpace functions until a patch is available. For Jenkins LTS versions 2.303.2 and earlier, consider disabling the FilePath#toURI, FilePath#hasSymlink, FilePath#absolutize, FilePath#isDescendant, and FilePath#get*DiskSpace functions until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Missing Authorization

Link Following

Path traversal

Weakness Enumeration

CWE-862

CWE-59

CWE-22

Related Identifiers

BDU:2021-06108

BDU:2021-06271

BIT-JENKINS-2021-21694

CVE-2021-21694

GHSA-PGJ6-JMJ5-WQFX

RHSA-2021:4799

RHSA-2021:4801

RHSA-2021:4827

RHSA-2021:4829

RHSA-2021:4833

Affected Products

Jenkins

References · 15

• https://bdu.fstec.ru/vul/2021-06108 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-21694 · Security Note
• https://osv.dev/vulnerability/CVE-2021-21694 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-06271 · Security Note
• https://osv.dev/vulnerability/BIT-jenkins-2021-21694 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-pgj6-jmj5-wqfx · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/671859 · Security Note
• https://jenkins.io/security/advisory/2021-11-04/#SECURITY-2455 · Vendor Advisory
• https://github.com/jenkinsci/jenkins/commit/104c751d907919dd53f5090f84d53c671a66457b · Note
• https://github.com/jenkinsci/jenkins/commit/5a245e42979abe4a26d41727c839521e36cedd74 · Note
• https://github.com/jenkinsci/jenkins/commit/63cde2daadc705edf086f2213b48c8c547f98358 · Note
• https://access.redhat.com/security/cve/cve-2021-21686 · Note
• https://access.redhat.com/security/cve/cve-2021-21694 · Note
• https://t.me/cibsecurity/31842 · Telegram Post
• https://t.me/cvenotify/22978 · Telegram Post