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AUSCERT External Security Bulletin Redistribution
ESB-2024.1717
Jenkins Security Advisory 2024-03-20
21 March 2024
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AusCERT Security Bulletin Summary
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Product: Jenkins (core)
Publisher: jenkins
Operating System: UNIX
Windows
Resolution: Patch/Upgrade
CVE Names: CVE-2024-22201
Original Bulletin:
https://www.jenkins.io/security/advisory/2024-03-20/
Comment: CVSS (Max): 7.5 CVE-2024-22201 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVSS Source: Jenkins
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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Jenkins Security Advisory 2024-03-20
This advisory announces vulnerabilities in the following Jenkins deliverables:
o Jenkins (core)
Descriptions
HTTP/2 denial of service vulnerability in bundled Jetty
SECURITY-3379 / CVE-2024-22201
Severity (CVSS): High
Description:
Jenkins bundles Winstone-Jetty, a wrapper around Jetty, to act as HTTP and
servlet server when started using java -jar jenkins.war. This is how Jenkins is
run when using any of the installers or packages, but not when run using
servlet containers such as Tomcat.
Jenkins 2.443 and earlier, LTS 2.440.1 and earlier bundles versions of Jetty
affected by the security vulnerability CVE-2024-22201. This vulnerability
allows unauthenticated attackers to cause a denial of service.
This only affects instances that enable HTTP/2, typically using the
--http2Port argument to java -jar jenkins.war or corresponding options in
service configuration files. It is disabled by default in all native
installers and the Docker images provided by the Jenkins project.
Jenkins 2.444, LTS 2.440.2 updates the bundled Jetty to version 10.0.20, which
is unaffected by these issues.
Administrators unable to update to these releases of Jenkins (or newer) are
advised to disable HTTP/2.
Severity
o SECURITY-3379: High
Affected Versions
o Jenkins weekly up to and including 2.443
o Jenkins LTS up to and including 2.440.1
Fix
o Jenkins weekly should be updated to version 2.444
o Jenkins LTS should be updated to version 2.440.2
These versions include fixes to the vulnerabilities described above. All prior
versions are considered to be affected by these vulnerabilities unless
otherwise indicated.
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