CVE-2021-21673
First published: Wed Jun 30 2021(Updated: )
Jenkins CAS Plugin 1.6.0 and earlier improperly determines that a redirect URL after login is legitimately pointing to Jenkins, allowing attackers to perform phishing attacks.
Credit: jenkinsci-cert@googlegroups.com jenkinsci-cert@googlegroups.com jenkinsci-cert@googlegroups.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Jenkins Cas | <=1.6.0 | |
| maven/org.jenkins-ci.plugins:cas-plugin | <=1.6.0 | 1.6.1 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2021/06/30/1
- https://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-2387
- https://nvd.nist.gov/vuln/detail/CVE-2021-21673
- https://github.com/jenkinsci/cas-plugin/commit/8ac536a953156160dbabb61bdb3b9bc75c3d0ef9
- https://github.com/advisories/GHSA-2vvr-5757-qp87 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2021-21673?
CVE-2021-21673 has a medium severity rating due to its potential use in phishing attacks.
How do I fix CVE-2021-21673?
To remediate CVE-2021-21673, upgrade the Jenkins CAS Plugin to version 1.6.1 or later.
What versions of Jenkins CAS Plugin are affected by CVE-2021-21673?
CVE-2021-21673 affects Jenkins CAS Plugin versions 1.6.0 and earlier.
What type of attacks does CVE-2021-21673 enable?
CVE-2021-21673 enables attackers to perform phishing attacks by improperly validating redirect URLs after login.
Is CVE-2021-21673 related to Jenkins security?
Yes, CVE-2021-21673 is a security vulnerability specific to the Jenkins CAS Plugin.
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