Denial of service in libmspack



Published: 2018-11-15
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-18585
CWE-ID CWE-476
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		libmspack
Universal components / Libraries / Libraries used by multiple products

Vendor Stuart Caie

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Null pointer dereference

EUVDB-ID: #VU15908

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2018-18585

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

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.

Mitigation

Update to version 0.8alpha.

Vulnerable software versions

libmspack: 0.3 - 0.7

CPE2.3 External links

http://github.com/kyz/libmspack/commit/8759da8db6ec9e866cb8eb143313f397f925bb4f


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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