CVE-2020-28049

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Summary

CVECVE-2020-28049
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-11-04 19:15:00 UTC
Updated2024-02-03 07:15:00 UTC
DescriptionAn 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.

Risk And Classification

Problem Types: CWE-362

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 9.0 All All All
Operating System Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 9.0 All All All
Operating System Fedoraproject Fedora 33 All All All
Operating System Fedoraproject Fedora 33 All All All
Operating System Opensuse Leap 15.1 All All All
Operating System Opensuse Leap 15.2 All All All
Operating System Opensuse Leap 15.1 All All All
Operating System Opensuse Leap 15.2 All All All
Application Sddm Project Sddm All All All All
Application Sddm Project Sddm All All All All

References

ReferenceSourceLinkTags
[security-announce] openSUSE-SU-2020:1870-1: moderate: Security update f SUSE lists.opensuse.org Mailing List, Third Party Advisory
Releases · sddm/sddm · GitHub MISC github.com Release Notes, Third Party Advisory
[SECURITY] [DLA 2436-1] sddm security update MLIST lists.debian.org Mailing List, Third Party Advisory
[SECURITY] Fedora 33 Update: sddm-0.19.0-3.fc33 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
[SECURITY] Fedora 33 Update: sddm-0.19.0-3.fc33 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org Third Party Advisory
sddm/ChangeLog at v0.19.0 · sddm/sddm · GitHub MISC github.com Release Notes, Third Party Advisory
Debian -- Security Information -- DSA-4783-1 sddm DEBIAN www.debian.org Third Party Advisory
Bug 1177201 – VUL-0: CVE-2020-28049: sddm: race condition in setting up Xorg -auth file in conjunction with Xorg -displayfd parameter MISC bugzilla.suse.com Exploit, Issue Tracking, Third Party Advisory
SDDM: Privilege Escalation (GLSA 202402-02) — Gentoo security security.gentoo.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 501690 Alpine Linux Security Update for sddm
  • 710853 Gentoo Linux SDDM Privilege Escalation Vulnerability (GLSA 202402-02)

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