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.
References
Link | Resource |
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http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00031.html | Mailing List Third Party Advisory |
https://bugzilla.suse.com/show_bug.cgi?id=CVE-2020-28049 | Exploit Issue Tracking Third Party Advisory |
https://github.com/sddm/sddm/blob/v0.19.0/ChangeLog | Release Notes Third Party Advisory |
https://github.com/sddm/sddm/releases | Release Notes Third Party Advisory |
https://lists.debian.org/debian-lts-announce/2020/11/msg00009.html | Mailing List Third Party Advisory |
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GT3EX5NSQJJAKY63ENSMEDX6NYZLYY3S/ | |
https://security.gentoo.org/glsa/202402-02 | |
https://www.debian.org/security/2020/dsa-4783 | Third Party Advisory |
Configurations
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Configuration 2 (hide)
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History
03 Feb 2024, 07:15
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07 Nov 2023, 03:21
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Information
Published : 2020-11-04 19:15
Updated : 2024-10-15 18:35
NVD link : CVE-2020-28049
Mitre link : CVE-2020-28049
CVE.ORG link : CVE-2020-28049
JSON object : View
Products Affected
sddm_project
- sddm
debian
- debian_linux
fedoraproject
- fedora
opensuse
- leap
CWE
CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')