Description
In Sudo before 1.9.12p2, the sudoedit (aka -e) feature mishandles extra arguments passed in the user-provided environment variables (SUDO_EDITOR, VISUAL, and EDITOR), allowing a local attacker to append arbitrary entries to the list of files to process. This can lead to privilege escalation. Affected versions are 1.8.0 through 1.9.12.p1. The problem exists because a user-specified editor may contain a “–” argument that defeats a protection mechanism, e.g., an EDITOR=’vim — /path/to/extra/file’ value.
References
https://www.sudo.ws/security/advisories/sudoedit_any/
https://www.debian.org/security/2023/dsa-5321
https://www.synacktiv.com/sites/default/files/2023-01/sudo-CVE-2023-22809.pdf
https://lists.debian.org/debian-lts-announce/2023/01/msg00012.html
