#VU15929 Null pointer dereference in libxkbcommon - CVE-2018-15863
Published: November 16, 2018
Vulnerability identifier: #VU15929
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-15863
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
libxkbcommon
libxkbcommon
Software vendor:
xkbcommon
xkbcommon
Description
The vulnerability allows a local attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer usage condition by the ResolveStateAndPredicate function, as defined in the xkbcomp/compat.c source code file. A local attacker can submit a specially crafted keymap file that submits malicious input to an affected system with a no-op modmaskexpression, trigger NULL pointer dereference and cause the application to crash.
Remediation
Update to version 0.8.2.