Upstream information

CVE-2020-28049 at MITRE

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.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v2 Scores
CVSS detail National Vulnerability Database
Base Score 3.3
Vector AV:L/AC:M/Au:N/C:P/I:P/A:N
Access Vector Local
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact None
CVSS v3 Scores
CVSS detail CNA (CISA-ADP) National Vulnerability Database
Base Score 6.3 6.3
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack Vector Local Local
Attack Complexity High High
Privileges Required Low Low
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact High High
Integrity Impact High High
Availability Impact None None
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1177201 [NEW]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Package Hub 15 SP1
  • sddm >= 0.18.0-bp151.4.6.1
  • sddm-branding-SLE >= 0.18.0-bp151.4.6.1
  • sddm-branding-openSUSE >= 0.18.0-bp151.4.6.1
  • sddm-branding-upstream >= 0.18.0-bp151.4.6.1
 Patchnames:
openSUSE-2020-1897
SUSE Package Hub 15 SP2
  • sddm >= 0.18.0-bp152.5.3.1
  • sddm-branding-SLE >= 0.18.0-bp152.5.3.1
  • sddm-branding-openSUSE >= 0.18.0-bp152.5.3.1
  • sddm-branding-upstream >= 0.18.0-bp152.5.3.1
 Patchnames:
openSUSE-2020-1899
openSUSE Leap 15.1
  • sddm >= 0.18.0-lp151.3.6.1
  • sddm-branding-openSUSE >= 0.18.0-lp151.3.6.1
  • sddm-branding-upstream >= 0.18.0-lp151.3.6.1
 Patchnames:
openSUSE-2020-1870
openSUSE Leap 15.2
  • sddm >= 0.18.0-lp152.5.3.1
  • sddm-branding-openSUSE >= 0.18.0-lp152.5.3.1
  • sddm-branding-upstream >= 0.18.0-lp152.5.3.1
 Patchnames:
openSUSE-2020-1870
openSUSE Leap 15.3
  • sddm >= 0.18.0-lp153.1.31
  • sddm-branding-openSUSE >= 0.18.0-lp153.1.31
 Patchnames:
openSUSE Leap 15.3 GA sddm-0.18.0-lp153.1.31
openSUSE Leap 15.4
  • sddm >= 0.19.0-lp154.3.6
  • sddm-branding-openSUSE >= 0.19.0-lp154.3.6
 Patchnames:
openSUSE Leap 15.4 GA sddm-0.19.0-lp154.3.6
openSUSE Tumbleweed
  • sddm >= 0.19.0-4.2
  • sddm-branding-openSUSE >= 0.19.0-4.2
  • sddm-branding-upstream >= 0.19.0-4.2
 Patchnames:
openSUSE-Tumbleweed-2024-11376

SUSE Timeline for this CVE

CVE page created: Thu Oct 1 16:43:56 2020
CVE page last modified: Sat Nov 1 22:11:21 2025