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                                CERT-Renater

                     Note d'Information No. 2024/VULN132
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DATE                : 21/03/2024

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S): Systems running Jenkins weekly versions prior
                                       to 2.444,
                         Jenkins LTS versions prior to 2.440.1.

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https://www.jenkins.io/security/advisory/2024-03-20/
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Jenkins Security Advisory 2024-03-20

This advisory announces vulnerabilities in the following Jenkins
deliverables:

     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

     SECURITY-3379: High

Affected Versions

     Jenkins weekly up to and including 2.443
     Jenkins LTS up to and including 2.440.1

Fix

     Jenkins weekly should be updated to version 2.444
     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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+ CERT-RENATER        |    tel : 01-53-94-20-44         +
+ 23/25 Rue Daviel    |    fax : 01-53-94-20-41         +
+ 75013 Paris         |   email:cert@support.renater.fr +
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