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Microsoft Windows DNS Server Escaped Zone Name Parameter Buffer Overflow Vulnerability

Risk

High

Date Discovered

April 13, 2007

Description

Microsoft Windows Domain Name System (DNS) Server Service is prone to a stack-based buffer-overflow vulnerability in its Remote Procedure Call (RPC) interface. A remote attacker may exploit this issue to run arbitrary code in the context of the DNS Server Service. The DNS service runs in the 'SYSTEM' context. Successfully exploiting this issue allows attackers to execute arbitrary code, facilitating the remote compromise of affected computers. Windows Server 2000 Service Pack 4, Windows Server 2003 Service Pack 1, and Windows Server 2003 Service Pack 2 are confirmed vulnerable to this issue. Microsoft Windows 2000 Professional SP4, Windows XP SP2, and Windows Vista are not affected by this vulnerability.

Technologies Affected

  • Microsoft Small Business Server 2000
  • Microsoft Small Business Server 2003
  • Microsoft Small Business Server 2003 Premium Edition
  • Microsoft Windows 2000 Server SP4
  • Microsoft Windows Server 2003 Datacenter x64 Edition SP2
  • Microsoft Windows Server 2003 Enterprise x64 Edition SP2
  • Microsoft Windows Server 2003 Itanium SP1
  • Microsoft Windows Server 2003 Itanium SP2
  • Microsoft Windows Server 2003 SP1
  • Microsoft Windows Server 2003 SP2
  • Microsoft Windows Server 2003 x64 SP1
  • Microsoft Windows Server 2003 x64 SP2

Recommendations

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

If global access isn't needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.

Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.
Microsoft released MS07-029 and fixes to address this issue. Please see the references for more information.

Credits

The vendor disclosed this issue.
Copyright © Symantec Corporation.
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Disclaimer
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.
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