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Date: Wed, 17 Apr 2024 18:35:21 +0200
From: Daniel Beck <ml@...kweb.net>
To: oss-security@...ts.openwall.com
Subject: Terrapin vulnerability in Jenkins CLI client
Jenkins is an open source automation server which enables developers around
the world to reliably build, test, and deploy their software.
The following releases contain fixes for security vulnerabilities:
* Jenkins 2.452
* Jenkins LTS 2.440.3
Summaries of the vulnerabilities are below. More details, severity, and
attribution can be found here:
https://www.jenkins.io/security/advisory/2024-04-17/
We provide advance notification for security updates on this mailing list:
https://groups.google.com/d/forum/jenkinsci-advisories
If you discover security vulnerabilities in Jenkins, please report them as
described here:
https://www.jenkins.io/security/#reporting-vulnerabilities
---
SECURITY-3386 / CVE-2023-48795
The CLI client (`jenkins-cli.jar`) in Jenkins 2.451 and earlier, LTS
2.440.2 and earlier bundles versions of the Apache MINA SSHD library that
are susceptible to CVE-2023-48795 (Terrapin attack). This vulnerability
allows a machine-in-the-middle attacker to reduce the security of an SSH
connection.
NOTE: This only affects the Jenkins CLI client when using the `-ssh`
connection mode, which is not the default.
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