CVE-2023-22809

Name	CVE-2023-22809
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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
References	DLA-3272-1, DSA-5321-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
sudo (PTS)	buster	1.8.27-1+deb10u3	vulnerable
	buster (security)	1.8.27-1+deb10u5	fixed
	bullseye (security), bullseye	1.9.5p2-3+deb11u1	fixed
	bookworm, sid	1.9.13p3-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
sudo	source	buster	1.8.27-1+deb10u5	DLA-3272-1
sudo	source	bullseye	1.9.5p2-3+deb11u1	DSA-5321-1
sudo	source	(unstable)	1.9.12p2-1

Notes

https://www.sudo.ws/security/advisories/sudoedit_any/
https://github.com/sudo-project/sudo/commit/0274a4f3b403162a37a10f199c989f3727ed3ad4
https://www.synacktiv.com/sites/default/files/2023-01/sudo-CVE-2023-22809.pdf
https://www.openwall.com/lists/oss-security/2023/01/19/1