CVE-2021-35938

Name	CVE-2021-35938
Description	A symbolic link issue was found in rpm. It occurs when rpm sets the desired permissions and credentials after installing a file. A local unprivileged user could use this flaw to exchange the original file with a symbolic link to a security-critical file and escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
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)
Debian Bugs	990543

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
rpm (PTS)	buster	4.14.2.1+dfsg1-1	vulnerable
	bullseye	4.16.1.2+dfsg1-3	vulnerable
	bookworm, sid	4.18.0+dfsg-1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
rpm	source	(unstable)	(unfixed)			990543

Notes

[bullseye] - rpm <ignored> (Minor issue)
[buster] - rpm <ignored> (Minor issue)
[stretch] - rpm <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=1964114