April 13, 2007
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.
- 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
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.
- SANS - Handler's Diary: Microsoft Vulnerability in RPC on Windows DNS Server
- Michael Howard - Lessons Learned from MS07-029: The DNS RPC Interface Buffer Overrun
- Microsoft - Microsoft Knowledge Base Artcile 936263: New KB article to help deploy DNS remot
- Microsoft - Microsoft Security Advisory (935964)
- Microsoft - Microsoft Security Bulletin MS07-029
- Microsoft - Microsoft Windows Homepage
- Nortel - Nortel Response to Microsoft Security Bulletin MS07-029 - BULLETIN ID: 200700797
- Microsoft - Update on Microsoft Security Advisory 935964
The vendor disclosed this issue.
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