ZDI-09-053: Microsoft Windows WINS Service Heap Overflow Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-09-053
August 11, 2009

-- CVE ID:
CVE-2009-1923

-- Affected Vendors:
Microsoft

-- Affected Products:
Microsoft Windows 2003 SP2
Microsoft Windows 2000 SP4

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-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Microsoft Windows. Authentication is not
required to exploit this vulnerability.

The specific flaw exists within the WINS.exe process which provides name
resolution services for NetBIOS networks. While parsing a push request
the WINS service copies packet data to a static heap buffer while within
a controlled loop. By providing a specially crafted request an attacker
can overflow this heap buffer leading to arbitrary code execution under
the SYSTEM context.

-- Vendor Response:
Microsoft has issued an update to correct this vulnerability. More
details can be found at:

http://www.microsoft.com/technet/security/bulletin/MS09-039.mspx

-- Disclosure Timeline:
2009-02-24 - Vulnerability reported to vendor
2009-08-11 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Anonymous

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