CVE-2020-28049
sddm - security update
6.3
MEDIUM
CVSS 3.1
EPSS 0.41%
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.
How to fix CVE-2020-28049
To remediate CVE-2020-28049, upgrade the affected package to a fixed version below.
- —upgrade to 0.19.0-1 or later
- —upgrade to 0.14.0-4+deb9u2 or later
- —upgrade to 0.18.0-1+deb10u1 or later
Is CVE-2020-28049 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 0.19.0-1
- from 0, < 0.14.0-4+deb9u2
- from 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 |