Description
avast! antivirus 4.8.1281.0, when Internet Explorer 6 or 7 is used, allows remote attackers to bypass detection of malware in an HTML document by placing an MZ header (aka "EXE info") at the beginning, and modifying the filename to have (1) no extension, (2) a .txt extension, or (3) a .jpg extension, as demonstrated by a document containing a CVE-2006-5745 exploit.
References
- multiple-antivirus-mzheader-code-execution(47435) vdb-entry
- 4723 third-party-advisory
- 20081209 Multiple Vendor Anti-Virus Software Malicious WebPage Detection Bypass -Update- mailing-list
- 20081208 Multiple Vendor Anti-Virus Software Malicious WebPage Detection Bypass mailing-list