CVE-2021-23239

Name	CVE-2021-23239
Description	The sudoedit personality of Sudo before 1.9.5 may allow a local unprivileged user to perform arbitrary directory-existence tests by winning a sudo_edit.c race condition in replacing a user-controlled directory by a symlink to an arbitrary path.
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-3181-1

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	Urgency	Origin	Debian Bugs
sudo	source	buster	1.8.27-1+deb10u4		DLA-3181-1
sudo	source	(unstable)	1.9.5-1

[stretch] - sudo <no-dsa> (Minor issue)
https://www.openwall.com/lists/oss-security/2021/01/11/2
https://www.sudo.ws/repos/sudo/rev/ea19d0073c02