CVE-2024-23897: Jenkins Command Line Interface (CLI) Path Traversal Vulnerability
First published: Wed Jan 24 2024(Updated: )
Jenkins 2.441 and earlier, LTS 2.426.2 and earlier does not disable a feature of its CLI command parser that replaces an '@' character followed by a file path in an argument with the file's contents, allowing unauthenticated attackers to read arbitrary files on the Jenkins controller file system.
Credit: Matisse Beckandt jenkinsci-cert@googlegroups.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/Jenkins | <2.442 | 2.442 |
| redhat/Jenkins LTS | <2.426.3 | 2.426.3 |
| maven/org.jenkins-ci.main:jenkins-core | >=2.427<2.440.1 | 2.440.1 |
| maven/org.jenkins-ci.main:jenkins-core | =2.441 | 2.442 |
| maven/org.jenkins-ci.main:jenkins-core | >=1.606<=2.426.2 | 2.426.3 |
| Jenkins CI/CD automation server | =2.442 | |
| Jenkins CI/CD automation server | =LTS 2.426.3 | |
| Jenkins Command Line Interface | ||
| Jenkins LTS | <2.426.3 | |
| Jenkins LTS | <2.442 |
Remedy
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
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Reference Links
- https://www.bleepingcomputer.com/news/security/exploits-released-for-critical-jenkins-rce-flaw-patch-now/
- https://www.theregister.com/2024/01/30/jenkins_rce_flaw_patch/
- https://www.bleepingcomputer.com/news/security/45k-jenkins-servers-exposed-to-rce-attacks-using-public-exploits/
- https://www.exploit-db.com/exploits/51993
- https://www.bleepingcomputer.com/news/security/cisa-warns-of-jenkins-rce-bug-exploited-in-ransomware-attacks/
- http://packetstormsecurity.com/files/176839/Jenkins-2.441-LTS-2.426.3-CVE-2024-23897-Scanner.html
- http://packetstormsecurity.com/files/176840/Jenkins-2.441-LTS-2.426.3-Arbitrary-File-Read.html
- http://www.openwall.com/lists/oss-security/2024/01/24/6
- https://www.jenkins.io/security/advisory/2024-01-24/#SECURITY-3314
- https://www.sonarsource.com/blog/excessive-expansion-uncovering-critical-security-vulnerabilities-in-jenkins/
- https://nvd.nist.gov/vuln/detail/CVE-2024-23897
- https://www.jenkins.io/changelog-stable/#v2.440.1
- https://github.com/jenkinsci/jenkins/commit/554f03782057c499c49bbb06575f0d28b5200edb
- https://www.sonarsource.com/blog/excessive-expansion-uncovering-critical-security-vulnerabilities-in-jenkins
- https://github.com/advisories/GHSA-6f9g-cxwr-q5jr (Advisory)
- https://www.jenkins.io/security/advisory/2024-01-24/#SECURITY-3314;
- https://access.redhat.com/errata/RHSA-2024:0776
- https://access.redhat.com/errata/RHSA-2024:0778
- https://access.redhat.com/errata/RHSA-2024:0775
- https://bugzilla.redhat.com/show_bug.cgi?id=2260180
- https://www.vicarius.io/vsociety/posts/the-anatomy-of-a-jenkins-vulnerability-cve-2024-23897-revealed-1
Frequently Asked Questions
What is the severity of CVE-2024-23897?
CVE-2024-23897 is considered a critical vulnerability due to its potential to allow unauthenticated attackers to read arbitrary files on the Jenkins controller.
How do I fix CVE-2024-23897?
To fix CVE-2024-23897, upgrade Jenkins to version 2.442 or LTS version 2.426.3 immediately.
Which versions of Jenkins are affected by CVE-2024-23897?
CVE-2024-23897 affects Jenkins versions 2.441 and earlier, as well as LTS version 2.426.2 and earlier.
What type of attack does CVE-2024-23897 enable?
CVE-2024-23897 enables unauthenticated attackers to exploit the CLI command parser to read sensitive files on the Jenkins controller.
Is there a workaround for CVE-2024-23897?
There is no official workaround for CVE-2024-23897; immediate upgrading is the recommended action.
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