NULL Pointer Dereference Affecting xorg-x11-server-devel package, versions <0:1.20.4-7.el7
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about NULL Pointer Dereference vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-CENTOS7-XORGX11SERVERDEVEL-2142600
- published26 Jul 2021
- disclosed26 Jun 2017
Introduced: 26 Jun 2017
CVE-2018-15862 (opens in a new tab)How to fix?
Upgrade Centos:7 xorg-x11-server-devel to version 0:1.20.4-7.el7 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream xorg-x11-server-devel package and not the xorg-x11-server-devel package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
Unchecked NULL pointer usage in LookupModMask 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 with invalid virtual modifiers.
References
- https://access.redhat.com/security/cve/CVE-2018-15862
- https://security.gentoo.org/glsa/201810-05
- https://github.com/xkbcommon/libxkbcommon/commit/4e2ee9c3f6050d773f8bbe05bc0edb17f1ff8371
- https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.html
- https://access.redhat.com/errata/RHSA-2019:2079
- https://usn.ubuntu.com/3786-1/
- https://usn.ubuntu.com/3786-2/