CVE-2020-28049

Name
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.
NVD Severity
medium
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
Exploit https://bugzilla.suse.com/show_bug.cgi?id=CVE-2020-28049
Release Notes https://github.com/sddm/sddm/blob/v0.19.0/ChangeLog
Release Notes https://github.com/sddm/sddm/releases
Third Party Advisory https://www.debian.org/security/2020/dsa-4783
Mailing List https://lists.debian.org/debian-lts-announce/2020/11/msg00009.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00031.html
Third Party Advisory https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GT3EX5NSQJJAKY63ENSMEDX6NYZLYY3S/

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:sddm_project:sddm:*:*:*:*:*:*:*:* sddm >= None < 0.19.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
sddm 3.13-community 0.19.0-r0 Bart Ribbers <bribbers@disroot.org> fixed