nnposter has reported a vulnerability in 8e6 R3000 Internet Filter, which can be exploited by malicious people to bypass certain security restrictions.
The vulnerability is caused due an error in the URL filter when processing custom HTTP headers. This can be exploited to bypass the URL filter via a custom HTTP header containing the string "Host:" followed by an unrestricted site.
The vulnerability is reported in version 188.8.131.52. Other versions may also be affected.
Solution: Update to version 2.1.05.13.
Provided and/or discovered by: nnposter
Original Advisory: http://archives.neohapsis.com/archives/bugtraq/2008-08/0035.html
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