Medium severity6.3NVD Advisory· Published Nov 4, 2020· Updated Jun 17, 2026
CVE-2020-28049
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
12cpe:2.3:a:sddm_project:sddm:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:sddm_project:sddm:*:*:*:*:*:*:*:*range: <0.19.0
- (no CPE)range: <0.19.0
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- SDDM/SDDMdescription
- osv-coords4 versionspkg:rpm/opensuse/sddm&distro=openSUSE%20Leap%2015.1pkg:rpm/opensuse/sddm&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/sddm&distro=openSUSE%20Tumbleweedpkg:rpm/suse/sddm&distro=SUSE%20Package%20Hub%2015%20SP2
< 0.18.0-lp152.5.3.1+ 3 more
- (no CPE)range: < 0.18.0-lp152.5.3.1
- (no CPE)range: < 0.18.0-lp152.5.3.1
- (no CPE)range: < 0.19.0-4.2
- (no CPE)range: < 0.18.0-bp152.5.3.1
Patches
Vulnerability mechanics
References
8- bugzilla.suse.com/show_bug.cginvdExploitIssue TrackingThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-11/msg00031.htmlnvdMailing ListThird Party Advisory
- github.com/sddm/sddm/blob/v0.19.0/ChangeLognvdRelease NotesThird Party Advisory
- github.com/sddm/sddm/releasesnvdRelease NotesThird Party Advisory
- lists.debian.org/debian-lts-announce/2020/11/msg00009.htmlnvdMailing ListThird Party Advisory
- www.debian.org/security/2020/dsa-4783nvdThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GT3EX5NSQJJAKY63ENSMEDX6NYZLYY3S/nvd
- security.gentoo.org/glsa/202402-02nvd
News mentions
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