NULL Pointer Dereference Affecting xorg-x11-server-common package, versions <0:1.20.4-7.amzn2.0.1


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.54% (41st percentile)

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  • Snyk IDSNYK-AMZN2-XORGX11SERVERCOMMON-1680447
  • published27 Sept 2021
  • disclosed25 Aug 2018

Introduced: 25 Aug 2018

CVE-2018-15859  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 xorg-x11-server-common to version 0:1.20.4-7.amzn2.0.1 or higher.
This issue was patched in ALAS2-2020-1433.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xorg-x11-server-common package and not the xorg-x11-server-common package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

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 Base Scores

version 3.1