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Microsoft KB Archive/173241

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Knowledge Base


Article ID: 173241

Article Last Modified on 10/19/2005



APPLIES TO

  • Microsoft TCP/IP for Windows for Workgroups 3.11b
  • Microsoft Windows for Workgroups 3.2



This article was previously published under Q173241

SYMPTOMS

Windows for Workgroups version 3.11 users with Microsoft TCP/IP installed and running may be susceptible to very specific "out-of-band" data packets that are deliberately sent to the server during a TCP/IP session. When they are received, these packets may cause the Windows for Workgroups 3.11-based computer to stop responding (hang).

CAUSE

This problem can occur if certain very specific "out-of-band" data packets are deliberately sent to the server during a TCP/IP session.

RESOLUTION

Microsoft has confirmed this to be a problem in Microsoft Windows for Workgroups 3.11 running Microsoft TCP/IP 32b.

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.



MORE INFORMATION

For additional information about out-of-band data issues, see the following articles in the Microsoft Knowledge Base:

168747 Update to Windows 95 TCP/IP to Address Out-of-Band Issue


143478 Stop 0A in TCPIP.SYS When Receiving Out Of Band (OOB) Data



Additional query words: attack

Keywords: kbqfe kbnetwork kbprb kbhotfixserver KB173241