CVE-2020-28049
medium
CVSS v3
—
CVSS v2
—
VIR risk
5.5
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.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-28049
Vendor advisory: arch — https://security.archlinux.org/ASA-202011-8
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 0.19.0-1 | |
| debian | bookworm | fixed | 0.19.0-1 |
| debian | bullseye | fixed | 0.19.0-1 |
| debian | forky | fixed | 0.19.0-1 |
| debian | sid | fixed | 0.19.0-1 |
| debian | trixie | fixed | 0.19.0-1 |
References
Verify integrity in audit chain (admin only). AS-IS.