CVE-2018-15858

Unchecked NULL pointer usage when handling invalid aliases in CopyKeyAliasesToKeymap in xkbcomp/keycodes.c in xkbcommon before 0.8.1 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 17%
VendorProductVersion
xkbcommonlibxkbcommon
𝑥
< 0.8.1
xkbcommonxkbcommon
𝑥
< 0.8.1
canonicalubuntu_linux
14.04
canonicalubuntu_linux
16.04
canonicalubuntu_linux
18.04
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
libxkbcommon
bullseye
1.0.3-2
fixed
stretch
ignored
jessie
no-dsa
bookworm
1.5.0-1
fixed
sid
1.6.0-1
fixed
trixie
1.6.0-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libxkbcommon
cosmic
not-affected
bionic
Fixed 0.8.0-1ubuntu0.1
released
xenial
Fixed 0.5.0-1ubuntu2.1
released
trusty
dne
Common Weakness Enumeration
References
https://github.com/xkbcommon/libxkbcommon/commit/badb428e63387140720f22486b3acbd3d738859f
https://lists.freedesktop.org/archives/wayland-devel/2018-August/039232.html
https://security.gentoo.org/glsa/201810-05
https://usn.ubuntu.com/3786-1/
https://usn.ubuntu.com/3786-2/
https://github.com/xkbcommon/libxkbcommon/commit/badb428e63387140720f22486b3acbd3d738859f
https://lists.freedesktop.org/archives/wayland-devel/2018-August/039232.html
https://security.gentoo.org/glsa/201810-05
https://usn.ubuntu.com/3786-1/
https://usn.ubuntu.com/3786-2/