#VU15908 Null pointer dereference in libmspack - CVE-2018-18585
Published: November 14, 2018 / Updated: November 15, 2018
Vulnerability identifier: #VU15908
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-18585
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
libmspack
libmspack
Software vendor:
Stuart Caie
Stuart Caie
Description
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to the chmd_read_headers function, as defined in the mspack/chmd.c source code file of the affected software, accepts filenames that have embedded NULL bytes. A remote attacker can trick the victim into accessing a Compiled HTML (CHM) file that submits malicious input to the targeted system, trigger NULL pointer dereference and cause the service to crash.
Remediation
Update to version 0.8alpha.