XFOR: AV in ExchINS with Very Long MessageID (196362)
The information in this article applies to:
- Microsoft Exchange Server 5.5
This article was previously published under Q196362 SYMPTOMS
ExchINS (Exchange NNTP) will cause an access violation error while
attempting to send an IHAVE message with an excessively long MessageID.
The debug stack is as follows:
Access Violation c0000005 in ExchINS
> kv
026efd54 00414b45 EXCHINS!CNNTPPost::SendIHave+0x128 (FPO: [ebp 00057e40]
[1,1,4])
026efd8c 00409355 EXCHINS!CNNTPOutboundStreamServer::HrGetStream+0xb5
(FPO: [ebp 00bf05c0] [2,8,4])
026efdc8 6f787b54 EXCHINS!CCollector::ImportMessageChangeAsAStream+0xd5
(FPO: [5,10,2])
026efe18 6f786321 EMSMDB32!IXMSGSYNC::EcUpdateCollector+0x174 (FPO: [ebp
02991474] [4,10,4])
026efe38 6f773300 EMSMDB32!IXMSGFXRCV::EcRcv+0x151 (FPO: [1,0,3])
026efe48 6f7784c9 EMSMDB32!FXRCVCTX::EcRcv+0x10 (FPO: [1,0,2])
026efe58 6f78715e EMSMDB32!FXRCVMGR::EcDoClient+0x39 (FPO: [2,0,2])
026efe88 6f7880a5 EMSMDB32!IXCHGSYNC::EcSynchronize+0x5e (FPO: [ebp
77f674e0] [3,5,4])
026efea4 00408a71 EMSMDB32!IXMSGSYNC::Synchronize+0x25 (FPO: [3,0,2])
026effb8 77f04f2c EXCHINS!HrGetOutboundThread+0x2c1 (FPO: [ebp 77f64b1c]
[1,61,4])
77f64b1c 0cc25de5 KERNEL32!BaseThreadStart+0x51(UKNOWN FPO TYPE)
CAUSE
This is because of ExchINS not comparing the length of the MessageID with
the amount of available buffer space.
RESOLUTION
A supported fix that corrects this problem is now available from Microsoft,
but has not been fully regression tested and should be applied only to
systems experiencing this specific problem. If you are not severely
affected by this specific problem, Microsoft recommends that you wait for
the next Microsoft Exchange Server version 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 on support costs, please go
to the following address on the World Wide Web:
The English version of this fix should have the following file attributes
or later:
Component: NNTP
File Name Version
-------------------------
Exchins.dll 5.5.2399.0
STATUS
Microsoft has confirmed this to be a problem in Exchange Server version
5.5.
MORE INFORMATION
The updated component limits MessageIDs to 256 characters, and will discard
messages with IDs longer than this.
| Modification Type: | Minor | Last Reviewed: | 4/28/2005 |
|---|
| Keywords: | kbbug kbfix KB196362 |
|---|
|