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TITLE:
Cisco ACE XML Gateway / Web Application Firewall Internal IP Address
Disclosure

SECUNIA ADVISORY ID:
SA36879

VERIFY ADVISORY:
http://secunia.com/advisories/36879/

DESCRIPTION:
nitrĜus has reported a weakness in Cisco ACE XML Gateway and Cisco
ACE Web Application Firewall, which can be exploited by malicious
people to disclose certain system information.

The weakness is caused due to error messages generated as responses
to unsupported HTTP requests including a client's normally hidden,
internal IP address. This can be exploited to disclose the IP address
of e.g. an internal load balancer via e.g. an OPTIONS HTTP request.

The weakness is reported in Cisco ACE XML Gateway and the Cisco ACE
Web Application Firewall versions 6.0 and prior.

SOLUTION:
The weakness will reportedly be fixed in system software version 6.1,
expected to be available in November 2009.

Remove IP addresses from outgoing HTTP error messages by using a web
proxy.

PROVIDED AND/OR DISCOVERED BY:
nitrĜus (Alejandro Hernandez H.), CubilFelino Security Research Lab

ORIGINAL ADVISORY:
Cisco:
http://www.cisco.com/warp/public/707/cisco-sr-20090925-axg.shtml

CubilFelino Security Research Lab:
http://www.brainoverflow.org/advisories/cisco_ace_xml_gw_ip_disclosure.txt

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