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Microsoft Windows Vista SMBv2 Signing Vulnerability Advisory Available in Danish  Advisory Available in German 

Secunia Advisory: SA27997  
Release Date: 2007-12-11
Last Update: 2007-12-13

Critical:
Moderately critical
Impact: System access
Where: From local network
Solution Status: Vendor Patch

OS:Microsoft Windows Vista


CVE reference:CVE-2007-5351 (Secunia mirror)

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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).

Do you have this product installed on your home computer? Scan using the free Personal Software Inspector. Check if a vulnerable version is installed on computers in your corporate network, using the Network Software Inspector.

Solution:
Apply patches.

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

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

Provided and/or discovered by:
Reported by the vendor.

Changelog:
2007-12-13: Added link to US-CERT.

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

Other References:
US-CERT VU#520465:
http://www.kb.cert.org/vuls/id/520465



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

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