Various HTTP content scanning systems fail to properly scan full-width/half-width Unicode encoded traffic. This may allow malicious content to bypass HTTP content scanning systems. Systems affected include Checkpoint Web Intelligence and IBM ISS Proventia Series systems.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/56796/GS07-01.txt
Source: https://packetstormsecurity.com/files/56796/GS07-01.txt.html