SB2019011023 - Information disclosure in mate-screensaver

Description

This security bulletin contains information about 1 vulnerability.

1) Information disclosure (CVE-ID: CVE-2018-20681)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a local non-authenticated attacker to read and manipulate data.

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.

Remediation

Install update from vendor's website.

References

• 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