The HTTP URL filtering function provided by the 8e6 Technologies R3000
Internet Filter can be bypassed by simply splitting the HTTP request line
(which contains the URI) into multiple packets.
Example:
packet 1: GE
packet 2: T / HTTP/1.0rn
This weakness is present regardless whether the site block is based on the
DNS name or the IP address. For circumventing blocks based solely on the
DNS name it is sufficient to arrange the HTTP request so that the request
line and the Host header end up in separate packets.
Example:
packet 1: GET / HTTP/1.0
X-SomeHeader: ...
....
packet 2: X-SomeOtherHeader: ....
Host: www.blocked.com
...
The vulnerability has been identified in version 2.0.05.33. However, other
versions may be also affected.
Solution:
Use a filtering solution that performs an HTTP request reassembly.
Found by:
nnposter
Feedback :
If you have additional information or notice any errors regarding this security advisory, please use contact form or email us at info()securityreason()com.
Microsoft Device IO Control wrapped by the iphlpapi.dll API shipping with Windows Vista 32 bit and 64 bit contains a possibly exploitable, buffer overflow corrupting kernel memory.