Microsoft KB Archive/321403

= FIX: SNA Server May Trap When Receiving Long BINDs =

Article ID: 321403

Article Last Modified on 2/22/2007

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APPLIES TO


 * Microsoft SNA Server 4.0
 * Microsoft SNA Server 4.0 Service Pack 1
 * Microsoft SNA Server 4.0 Service Pack 2
 * Microsoft SNA Server 4.0 Service Pack 3
 * Microsoft SNA Server 4.0 Service Pack 4
 * Microsoft Host Integration Server 2000 Standard Edition

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This article was previously published under Q321403



SYMPTOMS
When SNA Server receives a BIND that contains various routing vectors and security subfields, you may receive an Access Violation. Whether this behavior occurs depends on the length of the BIND request.



CAUSE
When SNA Server prepares the BIND response and tries to add the enciphered data to the BIND, the buffer is overwritten, which causes an Access Violation.



SNA Server 4.0
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next SNA Server version 4.0 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:

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

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 hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.   Date         Time    Version     Size      File name --  16-Apr-2002  08:59  4.0.0.606    468,864   Snaservr.exe 16-Apr-2002 08:59  4.0.0.606    935,344   Trcservr.exe

NOTE: Because of file dependencies, the most recent fix that contains the preceding files may also contain additional files.

Host Integration Server 2000
To resolve this problem, obtain the latest service pack for Host Integration Server 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

328152 How to Obtain the Latest Host Integration Server 2000 Service Pack

The English version of this fix should have the following file attributes or later:   Date         Time    Version     Size        File name --  08-Apr-2002  09:37  5.0.0.836      471,312   Snaservr.exe 08-Apr-2002 09:37  5.0.0.836    1,032,464   Trcservr.exe

NOTE: Because of file dependencies, the most recent fix that contains the preceding files may also contain additional files.



SNA Server 4.0
Microsoft has confirmed that this is a problem in SNA Server versions 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3, and 4.0 SP4.

Host Integration Server 2000
Microsoft has confirmed that this is a problem in Host Integration Server 2000. This problem was first corrected in Host Integration Server 2000 Service Pack 1.



MORE INFORMATION
This problem has been observed when SNA Server receives and parses a long BIND that comes from the IBM Enterprise Extender and includes High Performance Routing (HPR) data and Security vectors.

When you apply Dr. Watson as the default debugger, a Dr. Watson log is created that includes the following or similar content: Application exception occurred: App: exe\snabase.dbg (pid=266) When: 2/20/2002 @ 12:38:24.703 Exception number: c0000005 (access violation)

function: SNAGetBuffer 6722bf2b 8b4824          mov     ecx,[eax+0x24] ds:02141606=???????? 6722bf2e 03cf            add     ecx,edi 6722bf30 894824          mov     [eax+0x24],ecx ds:02141606=???????? 6722bf33 8b0b            mov     ecx,[ebx] ds:01043c00=000a2c00 6722bf35 030dc8bc2667    add     ecx,[BmD (6726bcc8)] ds:6726bcc8=01040000 6722bf3b 85ff            test    edi,edi 6722bf3d 8bc1            mov     eax,ecx 6722bf3f 7e2a            jle     SNAGetBuffer+0x22b (6722bf6b) 6722bf41 8b15c8bc2667    mov     edx,[BmD (6726bcc8)] ds:6726bcc8=01040000 6722bf47 8bf0            mov     esi,eax FAULT ->6722bf49 8b00            mov     eax,[eax] ds:010e2c00=???????


 * > Stack Back Trace <*

FramePtr ReturnAd Param#1 Param#2  Param#3  Param#4  Function Name 0ce5fc40 0101bb67 00000001 0102c6d0 00000001 00000001 snadmod!SNAGetBuffer (FPO: Non-FPO [1,3,3]) 0ce5fc94 0101519f 0ce5ff78 00000001 00004e20 00000210 snabase!TellPartners (FPO: Non-FPO [4,16,3]) 0ce5ffb8 77f04ee8 00baff38 00000000 00000000 00baff38 snabase!STabUpdateThread (FPO: Non-FPO [1,193,3]) 0ce5ffec 00000000 01014b80 00baff38 00000000 580c0148 kernel32!lstrcmpiW 00000000 00000000 00000000 00000000 00000000 00000000 snabase!

Additional query words: BIND EE security trap snaservr HIS 2000

Keywords: kbbug kbfix kbhostintegserv2000presp1fix kbhostintegserv2000sp1fix KB321403

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