For each HTTP request the Cisco PIX or other Cisco device forwards individual packets to Websense to determine whether or not the request should be permitted. However, when splitting the HTTP request into two or more packets on the HTTP method it is possible to circumvent the filtering mechanism. Affected versions are Websense 5.5.2, Cisco PIX OS / ASA versions below 7.0.4.12, Cisco PIX OS versions below 6.3.6(112), FWSM 2.3.x, and FWSM 3.x.
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