PT-2020-15309 · Cloudbees+1 · Jenkins

Daniel Beck · Published 2020-01-29 · Updated 2024-03-06 · CVE-2020-2102

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Jenkins versions 2.218 and earlier Jenkins LTS versions 2.204.1 and earlier

Description The issue arises from a non-constant time comparison function used when validating an HMAC. This could potentially allow attackers to use statistical methods to obtain a valid HMAC for an attacker-controlled input value.

Recommendations For Jenkins versions 2.218 and earlier, update to version 2.219 or later. For Jenkins LTS versions 2.204.1 and earlier, update to version 2.204.2 or later.

Fix

Side Channel Attack

Weakness Enumeration

CWE-208

CWE-203

Related Identifiers

BIT-JENKINS-2020-2102

CVE-2020-2102

GHSA-FJ6F-6933-839J

Affected Products

Jenkins

References · 13

• https://access.redhat.com/errata/RHSA-2020:0683 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-jenkins-2020-2102 · Vendor Advisory
• https://access.redhat.com/errata/RHBA-2020:0675 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-2102 · Security Note
• https://jenkins.io/security/advisory/2020-01-29/#SECURITY-1660 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2020:0681 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-2102 · Vendor Advisory
• https://access.redhat.com/errata/RHBA-2020:0402 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-fj6f-6933-839j · Vendor Advisory
• https://github.com/jenkinsci/jenkins · Note
• https://github.com/jenkinsci/jenkins/commit/6f35dbb939ebe947bdb1979010b208480f1d0e31 · Note
• https://t.me/cvenotify/597 · Telegram Post
• http://openwall.com/lists/oss-security/2020/01/29/1 · Note