CVE-2018-20681

Name	CVE-2018-20681
Description	mate-screensaver before 1.20.2 in MATE Desktop Environment allows physically proximate attackers to view screen content and possibly control applications. By unplugging and re-plugging or power-cycling external output devices (such as additionally attached graphical outputs via HDMI, VGA, DVI, etc.) the content of a screensaver-locked session can be revealed. In some scenarios, the attacker can execute applications, such as by clicking with a mouse.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
mate-screensaver (PTS)	bullseye	1.24.1-1	fixed
	bookworm	1.26.1-1+deb12u1	fixed
	forky, sid, trixie	1.26.2-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
mate-screensaver	source	jessie	(not affected)
mate-screensaver	source	(unstable)	1.20.2-1	low

Notes

[stretch] - mate-screensaver <no-dsa> (Minor issue)
[jessie] - mate-screensaver <not-affected> (Vulnerability only manifests when built against GTK-3.22)
https://github.com/mate-desktop/mate-screensaver/issues/152
https://github.com/mate-desktop/mate-screensaver/issues/155
https://github.com/mate-desktop/mate-screensaver/issues/170
https://github.com/mate-desktop/mate-screensaver/pull/167