CVE-2018-20681

NameCVE-2018-20681
Descriptionmate-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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
mate-screensaver (PTS)jessie1.8.1-2fixed
stretch1.16.1-1vulnerable
buster, sid1.20.3-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
mate-screensaversource(unstable)1.20.2-1
mate-screensaversourcejessie(not affected)

Notes

[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

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