Advisory Details

May 10th, 2011

Microsoft WINS Service Failed Response Memory Corruption Remote Code Execution Vulnerability

ZDI-11-167
ZDI-CAN-1075

CVE ID CVE-2011-1248
CVSS SCORE 10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS OS
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 11154. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Windows Internet Name Service (WINS). Authentication is not required to exploit this vulnerability.

The specific flaw exists within the wins.exe service distributed with Microsoft Windows 2003 Server. This service is designed to resolve NetBIOS requests and accepts connections on port 42. Due to a logic error when handling a socket send exception, certain user-supplied values remain within a stack frame and are re-used in another context. A remote attacker can abuse this flaw to cause a call to LeaveCriticalSection to operate upon a controlled location in memory. Such a condition could lead to remote code execution under the context of the SYSTEM user.

VENDOR RESPONSE Microsoft has issued an update to correct this vulnerability. More details can be found at:
http://www.microsoft.com/technet/security/bulletin/MS11-035.mspx
DISCLOSURE TIMELINE
  • 2011-01-21 - Vulnerability reported to vendor
  • 2011-05-10 - Coordinated public release of advisory
CREDIT Luigi Auriemma
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