Unspecified vulnerability in Secure Computing Webwasher 5.30 before build 3159 and 6.3.0 before build 3150 allows remote attackers to cause a denial of service (freeze) via a crafted URL.

Secure Computing Secure Web Gateway (aka Webwasher), 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.