CVE-2020-28049
Medium
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.
SeverityMedium
CVSS6.3
Exploit probability—
Product
Sddm
PublishedNov 4, 2020
First seenNov 4, 2020
Weakness typeCWE-362Race condition
How to fix
Update
- sddm_project sddm0.19.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| sddm_project sddm | v < 0.19.0 | 0.19.0 |
| opensuse leap | 15.1, 15.2 | — |
| debian debian_linux | 9.0, 10.0 | — |
| fedoraproject fedora | 33 | — |
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