Multiple interpretation error in eTrust CA 7.0.1.4 with the 11.9.1 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."

Computer Associates eTrust EZ Antivirus 7.0.0 to 7.0.4, including 7.0.1.4, installs its files with insecure permissions (ACLs), which allows local users to gain privileges by replacing critical programs with malicious ones, as demonstrated using VetMsg.exe.