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Vulnerability Score 5.1 5.1
CVE Id CVE-2005-3378
Last Modified 05 Sep 2008 04:54:13
Published 30 Oct 2005 09:34:00
Confidentiality Impact PARTIAL PARTIAL
Integrity Impact PARTIAL PARTIAL
Availability Impact PARTIAL PARTIAL
Access Vector NETWORK
Access Complexity HIGH
Authentication NONE



Multiple interpretation error in Norman 5.81 with the 5.83.02 engine allows remote attackers to bypass virus scanning via a file such as BAT, HTML, and EML with an "MZ" magic byte sequence which is normally associated with EXE, which causes the file to be treated as a safe type that could still be executed as a dangerous file type by applications on the end system, as demonstrated by a "triple headed" program that contains EXE, EML, and HTML content, aka the "magic byte bug."

Vulnerable Systems


  • Norman Virus Control 5.81 Engine 5.83.02





BUGTRAQ - 20051025 Multiple Vendor Anti-Virus Software Detection Evasion Vulnerability through

BID - 15189

Last Updated: 27 May 2016 10:40:54