GHSA-fj6f-6933-839j
Non-constant time HMAC comparison
At a glance
- Published
- Updated
- CVE
- CVE-2020-2102
- Aliases
- BIT-jenkins-2020-2102
- CVSS_V3
- CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Description
Jenkins 2.218 and earlier, LTS 2.204.1 and earlier does not use a constant-time comparison when checking whether two HMACs are equal. This could potentially allow attackers to use statistical methods to obtain a valid HMAC for an attacker-controlled input value. Jenkins 2.219, LTS 2.204.2 now uses a constant-time comparison when validating HMACs.
Affected packages
| Package | Versions |
|---|---|
| Maven · org.jenkins-ci.main:jenkins-core | introduced 0, fixed 2.204.2 |
| Maven · org.jenkins-ci.main:jenkins-core | introduced 2.205, fixed 2.219 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-2102 ADVISORY
- https://github.com/jenkinsci/jenkins/commit/6f35dbb939ebe947bdb1979010b208480f1d0e31 WEB
- https://access.redhat.com/errata/RHBA-2020:0402 WEB
- https://access.redhat.com/errata/RHBA-2020:0675 WEB
- https://access.redhat.com/errata/RHSA-2020:0681 WEB
- https://access.redhat.com/errata/RHSA-2020:0683 WEB
- https://github.com/jenkinsci/jenkins PACKAGE
- https://jenkins.io/security/advisory/2020-01-29/#SECURITY-1660 WEB
- http://www.openwall.com/lists/oss-security/2020/01/29/1 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |