Vulnerability Details : CVE-2020-28049
Potential exploit
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.
Products affected by CVE-2020-28049
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
- cpe:2.3:a:sddm_project:sddm:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-28049
0.07%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 17 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-28049
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
3.3
|
LOW | AV:L/AC:M/Au:N/C:P/I:P/A:N |
3.4
|
4.9
|
NIST | |
|
6.3
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N |
1.0
|
5.2
|
134c704f-9b21-4f2e-91b3-4a467353bcc0 | 2024-10-15 |
|
6.3
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N |
1.0
|
5.2
|
NIST |
CWE ids for CVE-2020-28049
-
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.Assigned by:
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
- nvd@nist.gov (Primary)
References for CVE-2020-28049
-
https://github.com/sddm/sddm/blob/v0.19.0/ChangeLog
sddm/ChangeLog at v0.19.0 · sddm/sddm · GitHubRelease Notes;Third Party Advisory
-
https://security.gentoo.org/glsa/202402-02
SDDM: Privilege Escalation (GLSA 202402-02) — Gentoo security
-
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GT3EX5NSQJJAKY63ENSMEDX6NYZLYY3S/
[SECURITY] Fedora 33 Update: sddm-0.19.0-3.fc33 - package-announce - Fedora Mailing-Lists
-
https://www.debian.org/security/2020/dsa-4783
Debian -- Security Information -- DSA-4783-1 sddmThird Party Advisory
-
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00031.html
[security-announce] openSUSE-SU-2020:1870-1: moderate: Security update fMailing List;Third Party Advisory
-
https://github.com/sddm/sddm/releases
Releases · sddm/sddm · GitHubRelease Notes;Third Party Advisory
-
https://bugzilla.suse.com/show_bug.cgi?id=CVE-2020-28049
Bug 1177201 – VUL-0: CVE-2020-28049: sddm: race condition in setting up Xorg -auth file in conjunction with Xorg -displayfd parameterExploit;Issue Tracking;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2020/11/msg00009.html
[SECURITY] [DLA 2436-1] sddm security updateMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GT3EX5NSQJJAKY63ENSMEDX6NYZLYY3S/
[SECURITY] Fedora 33 Update: sddm-0.19.0-3.fc33 - package-announce - Fedora Mailing-ListsThird Party Advisory
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