Article ID: 179129
Article Last Modified on 11/1/2006
APPLIES TO
- Microsoft Windows NT Server 4.0, Terminal Server Edition
- Microsoft Windows NT Workstation 3.51
- Microsoft Windows NT Workstation 4.0 Developer Edition
- Microsoft Windows NT Server 3.51
- Microsoft Windows NT Server 4.0 Standard Edition
- Microsoft Windows NT Server 4.0 Enterprise Edition
This article was previously published under Q179129
SYMPTOMS
Windows NT may stop responding (hang) with a STOP 0x0000000A or 0x00000019 message after receiving a number of deliberately corrupted UDP packets.
CAUSE
This behavior occurs due to a variation of the "teardrop" attack. Windows NT 4.0 with Service Pack 3 and the ICMP-fix is not susceptible to the original form of the teardrop attack. For more information on the ICMP- fix, please see the following article in the Microsoft Knowledge Base:
ARTICLE-ID: 154174
TITLE : Invalid ICMP Datagram Fragments Hang Windows NT, Windows 95
The modified teardrop attack works by sending pairs of deliberately constructed IP fragments which are reassembled into an invalid UDP datagram. Overlapping offsets cause the second packet to overwrite data in the middle of the UDP header contained in the first packet in such a way that the datagrams are left incomplete.
As Windows NT receives these invalid datagrams, it allocates kernel memory. If enough of these invalid datagrams are received Windows NT may hang with a STOP 0x0000000A or 0x00000019.
RESOLUTION
Windows NT 4.0
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack
For your convenience, the English version of this post-SP3 hotfix has been posted to the following Internet location. However, Microsoft recommends that you install Windows NT 4.0 Service Pack 4 to correct this problem.
NOTE: This hotfix supersedes the fix referred to in the following articles in the Microsoft Knowledge Base:
ARTICLE-ID: 143478
TITLE : Stop 0A in Tcpip.sys When Receiving Out Of Band (OOB) Data
ARTICLE-ID: 154174
TITLE : Invalid ICMP Datagram Fragments Hang Windows NT, Windows 95
ARTICLE-ID: 165005
TITLE : Windows NT Slows Down Due to Land Attack
ARTICLE-ID: 177245
TITLE : Multiprocessor Computer May Hang Because of Tcpip.sys
Windows NT 3.51
To resolve this problem, obtain the following fix.
This fix should have the following time stamp:
| 01/14/98 | 12:04p | 123,824 | Tcpip.sys | (Intel) |
| 01/14/98 | 12:00p | 216,848 | Tcpip.sys | (Alpha) |
This hotfix has been posted to the following Internet location:
NOTE: This fix supercedes the ICMP-fix, the OOB-fix, and the Land-fix hotfixes.
STATUS
Windows NT 4.0
Microsoft has confirmed this problem could result in some degree of security vulnerability in Windows NT version 4.0. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.
Windows NT 3.51
Microsoft has confirmed this problem could result in some degree of security vulnerability in Windows NT version 3.51. A fully supported fix is now available, but it has not been fully regression tested and should only be applied to systems determined to be at risk of attack. Please evaluate your system's physical accessibility, network and Internet connectivity, and other factors to determine the degree of risk to your system. If your system is sufficiently at risk, Microsoft recommends you apply this fix. Otherwise, wait for the next Windows NT service pack, which will contain this fix. Please contact Microsoft Technical Support for more information.
Additional query words: spoof crash crashes bonk.c boink.c ntfaqipr
Keywords: kbhotfixserver kbqfe kbbug kbfix KB179129
