CVEvulnerability

CVE-2020-28049

6.3 MEDIUM Published 2020-11-04 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2020-11-04
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.3 MEDIUM — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
6.3 MEDIUM — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS 2.0 ([email protected])
3.3 LOW — AV:L/AC:M/Au:N/C:P/I:P/A:N
Weaknesses
CWE-362

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.

Affected configurations

• sddm project sddm (< 0.19.0) • opensuse leap 15.1 • opensuse leap 15.2 • debian debian linux 9.0 • debian debian linux 10.0 • fedoraproject fedora 33

Related

Weakness · CWE (1)

  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization weakness

References