CVE-2018-15859

medium

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.

References

https://access.redhat.com/errata/RHSA-2019:2079

https://github.com/xkbcommon/libxkbcommon/commit/bb4909d2d8fa6b08155e449986a478101e2b2634

https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.html

https://security.gentoo.org/glsa/201810-05

https://usn.ubuntu.com/3786-1/

https://usn.ubuntu.com/3786-2/

Details

Source: MITRE

Published: 2018-08-25

Updated: 2019-08-06

Type: CWE-476

Risk Information

CVSS v2

Base Score: 2.1

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

Impact Score: 2.9

Exploitability Score: 3.9

Severity: LOW

CVSS v3

Base Score: 5.5

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

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM