Microsoft Windows XP NAT Helper ipnathlp.dll denial of service
| win-ipnathlp-dos (29917) |  Low Risk |
Description:
Microsoft Windows XP is vulnerable to a denial of service attack, caused by a NULL pointer dereference vulnerability in the Windows NAT Helper Components (ipnathlp.dll). A remote attacker on a shared network could send a specially-crafted DNS query to a vulnerable system to cause the ipnathlp.dll process to crash, resulting in a denial of service.
Note: Successful exploitation requires that Internet Connection Sharing is enabled.
Platforms Affected:
- Microsoft, Windows XP Professional
- Microsoft, Windows XP SP2
- Microsoft, Windows XP Home
Remedy:
No remedy available as of July 4, 2009.
Consequences:
Denial of Service
References:
- BID-20804: Microsoft Windows NAT Helper Remote Denial of Service Vulnerability
- CVE-2006-5614: Microsoft Windows NAT Helper Components (ipnathlp.dll) on Windows XP SP2, when Internet Connection Sharing is enabled, allows remote attackers to cause a denial of service (svchost.exe crash) via a malformed DNS query, which results in a null pointer dereference.
- OSVDB ID: 30096: Microsoft Windows NAT Helper Components ipnathlp.dll with ICS Malformed DNS Query DoS
- SA22592: Microsoft Windows Internet Connection Sharing Denial of Service
- SECTRACK ID: 1017133: Microsoft NAT Helper `ipnathlp.dll` Lets Remote Users Deny Service
- VUPEN/ADV-2006-4248: Microsoft Windows NAT Helper Components DNS Denial of Service Vulnerability
Reported:
Oct 28, 2006
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