CVE-2018-15859 — NULL Pointer Dereference in Libxkbcommon

CWE-476 — NULL Pointer Dereference10 documents7 sources
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 89.75%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
Xkbcommon LibxkbcommonDebian LibxkbcommonDebian X11-xkb-utils+2 more
Timeline
PublishedAug 25
Latest updateMay 14

Description

Unchecked NULL pointer usage when parsing invalid atoms in ExprResolveLhs in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file, because lookup failures are mishandled.

CVSS vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages6 packages

▶debiandebian/libxkbcommon< libxkbcommon 0.8.2-1 (bookworm)
▶Debianxkbcommon/libxkbcommon< 0.8.2-1+3
▶Ubuntuxkbcommon/libxkbcommon< 0.4.1-0ubuntu1.1+2

Also affects: Ubuntu Linux 14.04, 16.04, 18.04

Patches

Patch: github.com ↗Patch: lists.freedesktop.org ↗Patch: github.com ↗

🔴Vulnerability Details

4
GHSA
GHSA-2vjp-mp6g-39vx: Unchecked NULL pointer usage when parsing invalid atoms in ExprResolveLhs in xkbcomp/expr↗2022-05-14
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OSV
libxkbcommon vulnerabilities↗2018-11-06
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OSV
libxkbcommon vulnerabilities↗2018-10-08
▶
OSV
CVE-2018-15859: Unchecked NULL pointer usage when parsing invalid atoms in ExprResolveLhs in xkbcomp/expr↗2018-08-25
▶

📋Vendor Advisories

4
Ubuntu
libxkbcommon vulnerabilities↗2018-11-06
▶
Ubuntu
libxkbcommon vulnerabilities↗2018-10-08
▶
Debian
CVE-2018-15859: libxkbcommon - Unchecked NULL pointer usage when parsing invalid atoms in ExprResolveLhs in xkb...↗2018
▶
Red Hat
libxkbcommon: xkbcomp: NULL pointer dereference when parsing invalid atoms in ExprResolveLhs resulting in a crash↗2017-10-30
▶

💬Community

1
Bugzilla
CVE-2018-15859 libxkbcommon: xkbcomp: NULL pointer dereference when parsing invalid atoms in ExprResolveLhs resulting in a crash↗2018-08-28
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