Integer signedness error in the SET_VALUE function in rarvm.cpp in unrar 3.70 beta 3, as used in products including WinRAR and RAR for OS X, allows user-assisted remote attackers to cause a denial of service (crash) via a crafted RAR archive that causes a negative signed number to be cast to a large unsigned number.
CVSS Severity (version 2.0):
Impact Subscore: 2.9
Exploitability Subscore: 8.6
CVSS Version 2 Metrics:
Access Vector: Network exploitable; Victim must voluntarily interact with attack mechanism
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows disruption of service
References to Advisories, Solutions, and Tools
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20070711 Advisory - Clam AntiVirus RAR File Handling Denial Of Service Vulnerability.
Advisory; Patch Information; Exploit
20070731 FLEA-2007-0037-1 unrar
20070711 Re: Advisory - Clam AntiVirus RAR File Handling Denial Of Service Vulnerability.
20070711 RE: Advisory - Clam AntiVirus RAR File Handling Denial Of Service Vulnerability.
Vulnerable software and versions