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 hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Exchange Server 5.5 service pack that contains this hotfix.
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, 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 typical 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
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:
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 following article number to view the article in the Microsoft Knowledge Base:
119591 How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to 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:
304062 XGEN: Exchange Server 5.5 Post-SP4 RPC Fixes
