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Debian: CVE-2020-28049: sddm -- security update

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Debian: CVE-2020-28049: sddm -- security update

Severity
3
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:N)
Published
11/04/2020
Created
11/10/2020
Added
11/09/2020
Modified
11/16/2020

Description

An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents and, for example, intercept keystrokes or access the clipboard. This is caused by a race condition during Xauthority file creation.

Solution(s)

  • debian-upgrade-sddm

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