diffoscope before 256 allows directory traversal via an embedded filename in a GPG file. Contents of any file, such as ../.ssh/id_rsa, may be disclosed to an attacker. This occurs because the value of the gpg --use-embedded-filenames option is trusted.

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-25711
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OUNBANAWD6TZH2NRRV4YUIAXEHLUJQ47
• https://salsa.debian.org/reproducible-builds/diffoscope/-/commit/dfed769904c27d66a14a5903823d9c8c5aae860e
• https://salsa.debian.org/reproducible-builds/diffoscope/-/issues/361
• https://github.com/pypa/advisory-database/tree/main/vulns/diffoscope/PYSEC-2024-41.yaml