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TITLE:
Trend Micro InterScan Web Security "Proxy-Authorization" Information
Disclosure

SECUNIA ADVISORY ID:
SA33891

VERIFY ADVISORY:
http://secunia.com/advisories/33891/

CRITICAL:
Less critical

IMPACT:
Exposure of sensitive information

WHERE:
>From remote

SOFTWARE:
Trend Micro InterScan Web Security Suite for Windows 3.x
http://secunia.com/advisories/product/21343/
Trend Micro InterScan Web Security Suite for Linux 3.x
http://secunia.com/advisories/product/15721/
Trend Micro InterScan Web Security Virtual Appliance 3.x
http://secunia.com/advisories/product/21382/

DESCRIPTION:
david.vorel has reported a vulnerability in Trend Micro InterScan Web
Security Suite and Trend Micro InterScan Web Security Virtual
Appliance, which can be exploited by malicious people to disclose
sensitive information.

The vulnerability is caused due to the application forwarding the
"Proxy-Authorization" header to third-party websites when basic
authorization is enabled. This can be exploited to disclose the proxy
username and password by tricking a user into connecting to an
external resource using e.g. Windows Media Player.

SOLUTION:
Do not browse untrusted websites or follow untrusted links.

PROVIDED AND/OR DISCOVERED BY:
david.vorel

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