Microsoft Windows XP NAT Helper ipnathlp.dll denial of service
| win-ipnathlp-dos (29917) |  Medium 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.
*CVSS:
| Base Score: | 4 |
| Access Vector: | Remote |
| Access Complexity: | High |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Complete |
| Temporal Score: | 3.6 |
| Exploitability: | Functional |
| Remediation Level: | Unavailable |
| Report Confidence: | Uncorroborated |
Consequences:
Denial of Service
Remedy:
No remedy available as of July 9, 2011.
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
Platforms Affected:
- Microsoft Windows XP Professional
- Microsoft Windows XP SP2
- Microsoft Windows XP Home
Reported:
Oct 28, 2006
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.