Null pointer dereference in libxkbcommon - CVE-2018-15862
Published: November 16, 2018
Vulnerability identifier: #VU15928
CSH Severity: Low
CVSS v4.0: 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-2018-15862
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: xkbcommon
Affected software:
libxkbcommon
libxkbcommon
Detailed vulnerability 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 LookupModMask function, as defined in the xkbcomp/expr.c source code file. A local attacker can submit a specially crafted keymap file that submits malicious input to an affected system with invalid virtual modifiers, trigger NULL pointer dereference and cause the application to crash.
How to mitigate CVE-2018-15862
Update to version 0.8.2.