Use After Free 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.
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Test your applications- Snyk IDSNYK-RHEL7-XORGX11SERVERDEVEL-4914353
- published26 Jul 2021
- disclosed30 Jul 2018
Introduced: 30 Jul 2018
CVE-2018-15857 (opens in a new tab)How to fix?
Upgrade RHEL:7 xorg-x11-server-devel to version 0:1.20.4-7.el7 or higher.
This issue was patched in RHSA-2019:2079.
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 RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
An invalid free in ExprAppendMultiKeysymList in xkbcomp/ast-build.c in xkbcommon before 0.8.1 could be used by local attackers to crash xkbcommon keymap parsers or possibly have unspecified other impact by supplying a crafted keymap file.
References
- https://access.redhat.com/security/cve/CVE-2018-15857
- https://security.gentoo.org/glsa/201810-05
- https://github.com/xkbcommon/libxkbcommon/commit/c1e5ac16e77a21f87bdf3bc4dea61b037a17dddb
- https://lists.freedesktop.org/archives/wayland-devel/2018-August/039232.html
- https://access.redhat.com/errata/RHSA-2019:2079
- https://usn.ubuntu.com/3786-1/
- https://usn.ubuntu.com/3786-2/