Use After Free Affecting xorg-x11-server-source package, versions <0:1.20.4-7.amzn2.0.1
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-AMZN2-XORGX11SERVERSOURCE-1680440
- published27 Sept 2021
- disclosed25 Aug 2018
Introduced: 25 Aug 2018
CVE-2018-15857 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2 xorg-x11-server-source 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-source package and not the xorg-x11-server-source package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 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
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=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/