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TITLE:
Windows Vista Firewall Teredo Blocking Rule Security Bypass

SECUNIA ADVISORY ID:
SA26001

VERIFY ADVISORY:
http://secunia.com/advisories/26001/

CRITICAL:
Not critical

IMPACT:
Security Bypass

WHERE:
>From remote

OPERATING SYSTEM:
Microsoft Windows Vista
http://secunia.com/product/13223/

DESCRIPTION:
A security issue has been reported in Windows Vista, which can be
exploited by malicious people to bypass certain security
restrictions.

The problem is caused due to an error in the handling of the Teredo
transport mechanism resulting in network traffic being handled
incorrectly though the Teredo interface. This may result in certain
firewall rules being bypassed.

Successful exploitation may disclose certain information about a
system and its existence, but requires that the system's network
profile is not set to "Public" and that a user e.g. is tricked into
clicking a specially crafted link.

SOLUTION:
Apply patches.

Windows Vista:
http://www.microsoft.com/downloads/details.aspx?FamilyId=e9b64746-6afa-4a30-833d-e058e000c821

Windows Vista x64 Edition:
http://www.microsoft.com/downloads/details.aspx?FamilyId=0df5d190-3ad7-42d5-8629-43c47ec450cb

PROVIDED AND/OR DISCOVERED BY:
Jim Hoagland and Ollie Whitehouse, Symantec.

ORIGINAL ADVISORY:
MS07-038 (KB935807):
http://www.microsoft.com/technet/security/Bulletin/MS07-038.mspx

Symantec:
http://www.symantec.com/content/en/us/enterprise/research/SYMSA-2007-005.txt

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About:
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use those supplied by the vendor.

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