Multiple Symantec AntiVirus products including Norton AntiVirus 2005 11.0.0 Web Security Web Security 3.0.1.72 Mail Security for SMTP 4.0.5.66 AntiVirus Scan Engine 4.3.7.27 SAV/Filter for Domino NT 3.1.1.87 and Mail Security for Exchange 4.5.4.743 when running on Windows allows remote attackers to cause a denial of service (component crash) and avoid detection via a crafted RAR file.