Medium severity · published Aug 25, 2018
CVE-2018-15864
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…
5.5
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Libxkbcommon · Xkbcommon
through 0.8.1 · source: NVD
UL
Ubuntu Linux · Canonical
14.04; 16.04; 18.04 · source: NVD
XK
Xkbcommon · Xkbcommon
through 0.8.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-15864
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-15864
access.redhat.com
https://access.redhat.com/errata/RHSA-2019:2079
Patch
https://github.com/xkbcommon/libxkbcommon/commit/a8ea7a1d3daa7bdcb877615ae0a252c189153bd2
Mailing List
https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.html
Third Party Advisory
https://security.gentoo.org/glsa/201810-05
Third Party Advisory
https://usn.ubuntu.com/3786-1/
Third Party Advisory
https://usn.ubuntu.com/3786-2/
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