PT-2018-13248 · Xkbcommon+3 · Xkbcommon+3

Published 2018-08-09 · Updated 2024-01-05 · CVE-2018-15858

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions xkbcommon versions prior to 0.8.1

Description The issue arises from unchecked NULL pointer usage when handling invalid aliases in the CopyKeyAliasesToKeymap function in xkbcomp/keycodes.c. This could be exploited by local attackers to crash the xkbcommon parser by supplying a crafted keymap file, resulting in a NULL pointer dereference.

Recommendations For versions prior to 0.8.1, update to version 0.8.1 or later to resolve the issue. As a temporary workaround, consider restricting the use of crafted keymap files to minimize the risk of exploitation.

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALT-PU-2018-2114

CVE-2018-15858

MGASA-2018-0369

OPENSUSE-SU-2018_3802-1

SUSE-SU-2018:3685-1

SUSE-SU-2024:0037-1

USN-3786-1

USN-3786-2

Affected Products

Alt Linux

Suse

Ubuntu

Xkbcommon

References · 46

• https://github.com/xkbcommon/libxkbcommon/commit/badb428e63387140720f22486b3acbd3d738859f · Patch
• https://ubuntu.com/security/CVE-2018-15857 · Vendor Advisory
• https://security.gentoo.org/glsa/201810-05 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-15859 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-15861 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2018-0369 · Vendor Advisory
• https://usn.ubuntu.com/3786-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-15856 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-15853 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-15858 · Security Note
• https://ubuntu.com/security/CVE-2018-15862 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2018-15858 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-15858 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2018-0369.html · Security Note
• https://ubuntu.com/security/notices/USN-3786-1 · Vendor Advisory