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2003: 2,700 advisories published
2004: 3,100 advisories published
2005: 4,600 advisories published
2006: 5,300 advisories published

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TITLE:
Microsoft Windows Vista SMBv2 Signing Vulnerability

SECUNIA ADVISORY ID:
SA27997

VERIFY ADVISORY:
http://secunia.com/advisories/27997/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From local network

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

DESCRIPTION:
A vulnerability has been reported in Microsoft Windows Vista, which
can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to an improper implementation of
SMBv2 signing and can be exploited to execute arbitrary code by
spoofing the signature in a SMBv2 packet to a trusted host.

Successful exploitation requires e.g. that SMBv2 is enabled (not
enabled by default unless required by a host) and that SMBv2 is used
in the communications (not used when e.g. one system is a previous
operating system version).

SOLUTION:
Apply patches.

Windows Vista:
http://www.microsoft.com/downloads/details.aspx?FamilyId=9d22a9ee-cc08-4b2d-af4e-55d326f82761

Windows Vista x64:
http://www.microsoft.com/downloads/details.aspx?FamilyId=05a9501c-4da3-4fa1-901e-99cb262e5e36

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
MS07-063 (KB942624):
http://www.microsoft.com/technet/security/Bulletin/MS07-063.mspx

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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