CVE-2021-21606: Input Validation
First published: Wed Jan 13 2021(Updated: )
Jenkins 2.274 and earlier, LTS 2.263.1 and earlier improperly validates the format of a provided fingerprint ID when checking for its existence allowing an attacker to check for the existence of XML files with a short path.
Credit: jenkinsci-cert@googlegroups.com jenkinsci-cert@googlegroups.com jenkinsci-cert@googlegroups.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/jenkins | <0:2.263.3.1612433584-1.el7 | 0:2.263.3.1612433584-1.el7 |
| redhat/conmon | <2:2.0.21-1.rhaos4.5.el7 | 2:2.0.21-1.rhaos4.5.el7 |
| redhat/jenkins | <0:2.263.3.1612434332-1.el7 | 0:2.263.3.1612434332-1.el7 |
| redhat/machine-config-daemon | <0:4.5.0-202102050524.p0.git.2594.ff3b8c0.el8 | 0:4.5.0-202102050524.p0.git.2594.ff3b8c0.el8 |
| redhat/openshift | <0:4.5.0-202102050524.p0.git.0.9229406.el7 | 0:4.5.0-202102050524.p0.git.0.9229406.el7 |
| redhat/openshift-ansible | <0:4.5.0-202102031005.p0.git.0.c6839a2.el7 | 0:4.5.0-202102031005.p0.git.0.c6839a2.el7 |
| redhat/openshift-clients | <0:4.5.0-202102051529.p0.git.3612.61b096a.el8 | 0:4.5.0-202102051529.p0.git.3612.61b096a.el8 |
| redhat/runc | <0:1.0.0-72.rhaos4.5.giteadfc6b.el8 | 0:1.0.0-72.rhaos4.5.giteadfc6b.el8 |
| redhat/jenkins | <0:2.263.3.1612434510-1.el8 | 0:2.263.3.1612434510-1.el8 |
| maven/org.jenkins-ci.main:jenkins-core | >=2.264<=2.274 | 2.275 |
| maven/org.jenkins-ci.main:jenkins-core | <2.263.2 | 2.263.2 |
| redhat/jenkins | <2.275 | 2.275 |
| redhat/jenkins LTS | <2.263.2 | 2.263.2 |
| Jenkins LTS | <=2.263.1 | |
| Jenkins LTS | <=2.274 |
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Reference Links
- https://nvd.nist.gov/vuln/detail/CVE-2021-21606
- https://www.jenkins.io/security/advisory/2021-01-13/#SECURITY-2023
- https://github.com/jenkinsci/jenkins/commit/f576b2eb4375f2bb076ce477cee27a946b65f22a
- https://github.com/advisories/GHSA-f585-9fw3-rj2m (Advisory)
- https://www.cve.org/CVERecord?id=CVE-2021-21606 https://nvd.nist.gov/vuln/detail/CVE-2021-21606
- https://bugzilla.redhat.com/show_bug.cgi?id=1925159
- https://access.redhat.com/errata/RHSA-2021:0637
- https://access.redhat.com/errata/RHSA-2021:0429
- https://access.redhat.com/errata/RHSA-2021:0423
- https://access.redhat.com/security/cve/cve-2021-21606
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of CVE-2021-21606?
CVE-2021-21606 is rated as a medium severity vulnerability.
How do I fix CVE-2021-21606?
To fix CVE-2021-21606, upgrade Jenkins to version 2.275 or later, or LTS version 2.263.2 or later.
What versions of Jenkins are affected by CVE-2021-21606?
Versions of Jenkins up to and including 2.274 and LTS versions up to and including 2.263.1 are affected by CVE-2021-21606.
What does CVE-2021-21606 allow an attacker to do?
CVE-2021-21606 allows an attacker to improperly check for the existence of XML files with short paths.
Is there a workaround for CVE-2021-21606?
There is no official workaround for CVE-2021-21606, so upgrading is the recommended approach.
- collector/redhat-cve
- collector/github-advisory-latest
- alias/GHSA-f585-9fw3-rj2m
- alias/CVE-2021-21606
- collector/github-advisory
- agent/type
- agent/first-publish-date
- agent/references
- agent/severity
- agent/weakness
- agent/author
- collector/redhat-bugzilla
- source/Red Hat
- agent/software-canonical-lookup
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/description
- agent/event
- agent/trending
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-api
- agent/software-canonical-lookup-request
- collector/nvd-cve
- collector/nvd-index
- package-manager/redhat
- package-manager/maven
- vendor/jenkins
- canonical/jenkins lts
- version/jenkins lts/2.263.1
- version/jenkins lts/2.274