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Microsoft Windows Media Services NSIISlog.DLL Remote Buffer Overflow Vulnerability

Risk

High

Date Discovered

June 25, 2003

Description

Microsoft has reported a buffer overflow vulnerability in Windows Media Services. This is due to a problem with how the logging ISAPI extension handles incoming client requests. This could cause arbitrary code execution in IIS, which is exploitable through Media Services.

Technologies Affected

  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Advanced Server SP1
  • Microsoft Windows 2000 Advanced Server SP2
  • Microsoft Windows 2000 Advanced Server SP3
  • Microsoft Windows 2000 Advanced Server SP4
  • Microsoft Windows 2000 Datacenter Server
  • Microsoft Windows 2000 Datacenter Server SP1
  • Microsoft Windows 2000 Datacenter Server SP2
  • Microsoft Windows 2000 Datacenter Server SP3
  • Microsoft Windows 2000 Datacenter Server SP4
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Server SP1
  • Microsoft Windows 2000 Server SP2
  • Microsoft Windows 2000 Server SP3
  • Microsoft Windows 2000 Server SP4
  • Microsoft Windows NT 4.0
  • Microsoft Windows NT 4.0 SP1
  • Microsoft Windows NT 4.0 SP2
  • Microsoft Windows NT 4.0 SP3
  • Microsoft Windows NT 4.0 SP4
  • Microsoft Windows NT 4.0 SP5
  • Microsoft Windows NT 4.0 SP6
  • Microsoft Windows NT 4.0 SP6a

Recommendations

Block external access at the network boundary, unless external parties require service.

Filter client requests to streaming media servers by external or untrusted hosts and networks at the network perimeter. Traffic to the logging server should be also be blocked at network firewalls and routers.

Disable any unneccessary default services.

Do not install Media Services or any other components that are not explicitly required.
** March 9, 2004 - Microsoft has reported that under certain circumstances the original security update provided to address this issue did not function properly and failed to replace the vulnerable file on an affected system. The issue results in situations relating to whether or not Windows Media Services was uninstalled previous to the application of the update. Microsoft has addressed this issue and released an updated Security Bulletin MS03-022. Please see the referenced bulletin for more information. A patch has been made available for Windows 2000 and Windows 2000 Service Pack 3:

Credits

Discovery of this vulnerability has been credited to Brett Moore.
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Disclaimer
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