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Q294977: XADM: RPC Denial of Service Attack Stops Information Store

Article: Q294977
Product(s): Microsoft Exchange
Version(s): 5.5,5.5 SP1,5.5 SP2,5.5 SP3,5.5 SP4
Operating System(s): 
Keyword(s): kbExchange550preSP5fix
Last Modified: 08-MAY-2002

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The information in this article applies to:

- Microsoft Exchange Server, versions 5.5, 5.5 SP1, 5.5 SP2, 5.5 SP3, 5.5 SP4 
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SYMPTOMS
========

The Exchange Server 5.5 information store may stop unexpectedly while under a
remote procedure call (RPC) denial of service attack. A call stack that is
similar to the following may be logged in the Drwtsn32.log:

  

  FramePtr RetAddr Param1 Param2 Param3 Function Name
  04eef9b4 77cf3081 00178910 02960296 00000001 ESEBACK!HrRBackupEnd+0x27
  04eef9cc 77d62aba 6fd12730 04eefa1c 00000001 0x77cf3081
  04eefcd0 77d62dc6 00000000 00000000 0017da28 0x77d62aba
  04eefce8 77cf2735 00000001 0016a370 0017da28 0x77d62dc6
  04eefd1c 77cf26a2 6fd15046 0017da28 04eefdfc 0x77cf2735

RESOLUTION
==========

A supported fix is now available from Microsoft, but it is only intended to
correct the problem described in this article and should be applied only to
systems experiencing this specific problem. This fix may receive additional
testing at a later time, to further ensure product quality. Therefore, if you
are not severely affected by this problem, Microsoft recommends that you wait
for the next Microsoft Exchange Server 5.5 service pack that contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services
to obtain the fix. For a complete list of Microsoft Product Support Services
phone numbers and information about support costs, please go to the following
address on the World Wide Web:

  http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

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

The English version of this fix should have the following file attributes or
later:

Component: JET

+---------------------------+
| File name   | Version     | 
+---------------------------+
| Eseback.dll | 5.5.2654.51 | 
+---------------------------+

NOTE: Because of file dependencies, this fix requires Microsoft Exchange Server
version 5.5 Service Pack 4.

The following files are available for download from the Microsoft Download
Center:

  English (US):
  DownloadDownload Q304062engi386.exe now

  French:
  DownloadDownload Q304062frni386.exe now

  German:
  DownloadDownload Q304062geri386.exe now

  Japanese:
  DownloadDownload Q304062jpni386.exe now

These files contain the following files:

  

  Dbserver.sch 
  Dcprods.cat 
  Dsamain.exe 
  Ems_rid.dll 
  Emsmta.exe 
  Eseback.dll 
  Infoplog.cfg 
  Mad.exe 
  Mtacheck.exe 
  Mtamsg.dll 
  Mtaperf.dll 
  P2.xv2 
  P42.tpl 
  P772.tpl 
  Store.exe 
  X400om.dll

Release Date: July 24, 2001

For additional information about how to download Microsoft Support files, click
the article number below to view the article in the Microsoft Knowledge Base:

  Q119591 How to Obtain Microsoft Support Files from Online Services

Microsoft used the most current virus detection software available on the date of
posting to scan this file for viruses. After it is posted, the file is housed on
secure servers that prevent any unauthorized changes to the file.

For additional information about the fixes that are included in this package,
click the article number below to view the article in the Microsoft Knowledge
Base:

  Q304062 XGEN: Exchange Server 5.5 Post-SP4 RPC Fixes



STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 5.5.

Additional query words:

======================================================================
Keywords          : kbExchange550preSP5fix 
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2 kbExchange550SP1 kbExchange550SP2 kbExchange550SP3 kbExchange550SP4
Version           : :5.5,5.5 SP1,5.5 SP2,5.5 SP3,5.5 SP4
Issue type        : kbbug
Solution Type     : kbfix

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