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GLSA-202402-02 : SDDM: Privilege Escalation

medium Nessus Plugin ID 189971

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Description

The remote host is affected by the vulnerability described in GLSA-202402-02 (SDDM: Privilege Escalation)

 - 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. (CVE-2020-28049)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

All SDDM users should upgrade to the latest version:

 # emerge --sync # emerge --ask --oneshot --verbose >=x11-misc/sddm-0.18.1-r6

See Also

https://security.gentoo.org/glsa/202402-02

https://bugs.gentoo.org/show_bug.cgi?id=753104

Plugin Details

Severity: Medium

ID: 189971

File Name: gentoo_GLSA-202402-02.nasl

Version: 1.0

Type: local

Published: 2/3/2024

Updated: 2/3/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Low

Base Score: 3.3

Temporal Score: 2.6

Vector: CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2020-28049

CVSS v3

Risk Factor: Medium

Base Score: 6.3

Temporal Score: 5.7

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:sddm, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/3/2024

Vulnerability Publication Date: 11/4/2020

Reference Information

CVE: CVE-2020-28049