CVE-2023-43496: Incorrect Default Permissions

September 20, 2023 (updated September 23, 2023)

Jenkins 2.423 and earlier, LTS 2.414.1 and earlier creates a temporary file in the system temporary directory with the default permissions for newly created files when installing a plugin from a URL, potentially allowing attackers with access to the system temporary directory to replace the file before it is installed in Jenkins, potentially resulting in arbitrary code execution.

References

www.openwall.com/lists/oss-security/2023/09/20/5
nvd.nist.gov/vuln/detail/CVE-2023-43496
www.jenkins.io/security/advisory/2023-09-20/

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