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=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2024.2376 Jenkins Security Advisory 2024-04-17 18 April 2024 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Jenkins (core) Publisher: Jenkins Operating System: Windows UNIX variants (UNIX, Linux, OSX) Resolution: Patch/Upgrade CVE Names: CVE-2023-48795 Original Bulletin: https://www.jenkins.io/security/advisory/2024-04-17/ Comment: CVSS (Max): 5.9 CVE-2023-48795 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N) CVSS Source: NIST Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N - --------------------------BEGIN INCLUDED TEXT-------------------- Jenkins Security Advisory 2024-04-17 This advisory announces vulnerabilities in the following Jenkins deliverables: o Jenkins (core) Descriptions 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 o SECURITY-3386: Medium Affected Versions o Jenkins weekly up to and including 2.451 o Jenkins LTS up to and including 2.440.2 Fix o Jenkins weekly should be updated to version 2.452 o Jenkins LTS should be updated to version 2.440.3 These versions include fixes to the vulnerabilities described above. All prior versions are considered to be affected by these vulnerabilities unless otherwise indicated. - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. ===========================================================================