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Bug 1623026 - (CVE-2018-15859) CVE-2018-15859 libxkbcommon: NULL pointer dereference when parsing invalid atoms in ExprResolveLhs resulting in a crash
CVE-2018-15859 libxkbcommon: NULL pointer dereference when parsing invalid at...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20171030,reported=2...
: Security
Depends On: 1623038 1643477
Blocks: 1623044
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Reported: 2018-08-28 07:56 EDT by Andrej Nemec
Modified: 2018-10-26 06:44 EDT (History)
4 users (show)

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Fixed In Version: libxkbcommon 0.8.2
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Description Andrej Nemec 2018-08-28 07:56:41 EDT 
Unchecked NULL pointer usage when parsing invalid atoms in ExprResolveLhs in xkbcomp/expr.c 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 lookup failures are mishandled.

Upstream patch:

https://github.com/xkbcommon/libxkbcommon/commit/bb4909d2d8fa6b08155e449986a478101e2b2634

References:

https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.html
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