CVE-2021-31523

Name	CVE-2021-31523
Description	The Debian xscreensaver 5.42+dfsg1-1 package for XScreenSaver has cap_net_raw enabled for the /usr/libexec/xscreensaver/sonar file, which allows local users to gain privileges because this is arguably incompatible with the design of the Mesa 3D Graphics library dependency.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severity	high
Debian Bugs	987149

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
xscreensaver (PTS)	stretch	5.36-1	vulnerable
	buster	5.42+dfsg1-1	vulnerable
	bullseye, sid	5.45+dfsg1-1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
xscreensaver	source	(unstable)	(unfixed)			987149

Notes

[buster] - xscreensaver <no-dsa> (Minor issue)
[stretch] - xscreensaver <no-dsa> (Minor issue)
Fixed upstream in 6.00 (no public version control): https://twitter.com/jwz/status/1383503845217554444
https://www.openwall.com/lists/oss-security/2021/04/17/1
https://bugs.chromium.org/p/project-zero/issues/detail?id=2174