NULL Pointer Dereference Affecting libxkbcommon package, versions <0:0.7.1-3.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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- published10 Apr 2022
- disclosed25 Aug 2018
Introduced: 25 Aug 2018
CVE-2018-15864 (opens in a new tab)How to fix?
Upgrade Oracle:7 libxkbcommon to version 0:0.7.1-3.el7 or higher.
This issue was patched in ELSA-2019-2079.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libxkbcommon package and not the libxkbcommon package as distributed by Oracle.
See How to fix? for Oracle: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.
References
- https://linux.oracle.com/cve/CVE-2018-15864.html
- https://linux.oracle.com/errata/ELSA-2019-2079.html
- https://access.redhat.com/errata/RHSA-2019:2079
- https://github.com/xkbcommon/libxkbcommon/commit/a8ea7a1d3daa7bdcb877615ae0a252c189153bd2
- https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.html
- https://security.gentoo.org/glsa/201810-05
- https://usn.ubuntu.com/3786-1/
- https://usn.ubuntu.com/3786-2/