PT-2018-13245 · Xkbcommon+4 · Xkbcommon+4

Published 2018-08-25 · Updated 2024-01-05 · CVE-2018-15855

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 in the xkbcommon parser, which can be exploited by local attackers to cause a crash due to a NULL pointer dereference. This can occur when a crafted keymap file is supplied, specifically mishandling the XkbFile for an xkb geometry section.

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

CESA-2019_2079

CVE-2018-15855

MGASA-2018-0369

OPENSUSE-SU-2018_3802-1

RHSA-2019:2079

RHSA-2019_2079

SUSE-SU-2018:3685-1

SUSE-SU-2024:0037-1

USN-3786-1

USN-3786-2

Affected Products

Centos

Red Hat

Suse

Ubuntu

Xkbcommon

References · 48

• https://github.com/xkbcommon/libxkbcommon/commit/917636b1d0d70205a13f89062b95e3a0fc31d4ff · Patch
• https://ubuntu.com/security/CVE-2018-15857 · Vendor Advisory
• https://security.gentoo.org/glsa/201810-05 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-15855 · Security Note
• https://ubuntu.com/security/CVE-2018-15859 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2019-2079.html · 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://osv.dev/vulnerability/CVE-2018-15855 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-15856 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-15855 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-15853 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-15862 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2018-0369.html · Security Note