NULL Pointer Dereference Affecting gdm-pam-extensions-devel package, versions <1:3.28.2-16.el7


Severity

Recommended
medium

Based on CentOS security rating.

Threat Intelligence

EPSS
0.04% (5th percentile)

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  • Snyk IDSNYK-CENTOS7-GDMPAMEXTENSIONSDEVEL-2143433
  • published26 Jul 2021
  • disclosed26 Jun 2017

Introduced: 26 Jun 2017

CVE-2018-15864  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Centos:7 gdm-pam-extensions-devel to version 1:3.28.2-16.el7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gdm-pam-extensions-devel package and not the gdm-pam-extensions-devel package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

Unchecked NULL pointer usage in resolve_keysym in xkbcomp/parser.y 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 a map access attempt can occur for a map that was never created.