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CVE-2020-28049

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 202402-02
Posted Feb 5, 2024
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202402-2 - A vulnerability has been discovered in SDDM which can lead to privilege escalation. Versions greater than or equal to 0.18.1-r6 are affected.

tags | advisory
systems | linux, gentoo
advisories | CVE-2020-28049
SHA-256 | 6b963f4bd06c531eca044b5135208a427fda74b10ead04703ae9d3458fab5725
Download | Favorite | View
Debian Security Advisory 4783-1
Posted Nov 28, 2020
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4783-1 - Fabian Vogt discovered a flaw in sddm, a modern display manager for X11. A local attacker can take advantage of a race condition when creating the Xauthority file to escalate privileges.

tags | advisory, local
systems | linux, debian
advisories | CVE-2020-28049
SHA-256 | dae94fe733cb181789d3d0eb0c0c969c208250934490d6cb40341be35ed4ac65
Download | Favorite | View
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