From: Secunia Security Advisories (sec-advsecunia.com)
Date: Wed Dec 16 2009 - 16:32:11 CST

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TITLE:
Stonesoft StoneGate SSL VPN Same Origin Policy Bypass

SECUNIA ADVISORY ID:
SA37788

VERIFY ADVISORY:
http://secunia.com/advisories/37788/

DESCRIPTION:
A vulnerability has been reported in StoneGate SSL VPN, which can be
exploited by malicious people to bypass certain security
restrictions.

The vulnerability is caused due to the web-based VPN implementation
prepending the same domain to all opened websites. This can be
exploited to bypass a browser's same origin policy and e.g. access
cookies for normally restricted domains by tricking a user into
browsing to a malicious website via the VPN.

SOLUTION:
Deploy only trusted resources to the SSL VPN portal. Please see the
vendor's advisory for more information.

PROVIDED AND/OR DISCOVERED BY:
US-CERT credits Michal Zalewski and Mike Zusman for the original
report.

Additional vulnerability details provided by David Warren and Ryan
Giobbi of US-CERT.

ORIGINAL ADVISORY:
Stonesoft:
http://www.stonesoft.com/en/support/security_advisories/2009_03_12.html

US-CERT VU#261869:
http://www.kb.cert.org/vuls/id/261869

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