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CloudBees Security Advisory 2024-04-18

This advisory announces vulnerabilities in CloudBees CI and Jenkins

Terrapin SSH vulnerability in Jenkins CLI client

SECURITY-3386 / CVE-2023-48795
Severity (CVSS): Medium
Description:

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.

This only affects the Jenkins CLI client when using the -ssh connection mode, which is not the default.

The CLI client (jenkins-cli.jar) in Jenkins 2.452, LTS 2.440.3 bundles version 2.12.1 of the Apache MINA SSHD library, which is unaffected by this issue.


Severity

Fix

  • CloudBees Traditional Platforms should be upgraded to 2.440.3.7

  • CloudBees Cloud Platforms should be upgraded to 2.440.3.7

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