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Debian LTS Advisory ([SECURITY] [DLA 1959-1] xtrlock security update)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update for the 'xtrlock' package(s) announced via the DSA-1959-1 advisory.
Insight
Insight
It was discovered that multitouch devices were not being disabled by the 'xtrlock' screen locking utility. xtrlock did not block multitouch events so an attacker could still input and thus control various programs such as Chromium, etc. via so-called 'multitouch' events including pan scrolling, 'pinch and zoom' or even being able to provide regular mouse clicks by depressing the touchpad once and then clicking with a secondary finger.
Affected Software
Affected Software
'xtrlock' package(s) on Debian Linux.
Detection Method
Detection Method
Checks if a vulnerable package version is present on the target host.
Solution
Solution
For Debian 8 'Jessie', this issue has been fixed in xtrlock version 2.6+deb8u1. However, this fix does not the situation where an attacker plugs in a multitouch device *after* the screen has been locked. For more information on this, please see: We recommend that you upgrade your xtrlock packages.