Internet Security Systems, Inc. Information for VU#739224

HTTP content scanning systems full-width/half-width Unicode encoding bypass



Vendor Statement

IBM Internet Security Systems updated its Proventia products to contain this evasion technique on May 8, 2007.

The HTTP Post normalization logic has been updated to address an evasion that can occur when parsing Microsoft Unicode syntax. This issue was reported to IBM/ISS by Fatih Ozavci and Caglar Cakici of GamaSec (

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Vendor References



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