CVE-2020-28049
MEDIUM6.3EPSS 0.04%sddm - security update
Published: 11/4/2020Modified: 4/28/2026
Also known as:DEBIAN-CVE-2020-28049
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 packages (3)
- Debian/sddmfrom 0, < 0.19.0-1
- Debian/sddmfrom 0, < 0.14.0-4+deb9u2
- Debian/sddmfrom 0, < 0.18.0-1+deb10u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.3 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N |