DOCUMENT:Q321403 08-MAY-2002 [sna] TITLE :FIX: SNA Server May Trap When Receiving Long BINDs PRODUCT :Microsoft SNA Server PROD/VER::4.0,4.0 SP1,4.0 SP2,4.0 SP3,4.0 SP4 OPER/SYS: KEYWORDS:sna4 kbsna400sp1 kbsna400sp2 kbsna400sp3 kbhis2000 kbhis2000bug kbsna400sp4 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft SNA Server, versions 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3, 4.0 SP4 - Microsoft Host Integration Server 2000 ------------------------------------------------------------------------------- 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. RESOLUTION ========== SNA Server 4.0 -------------- 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 SNA Server version 4.0 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: 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 above files may also contain additional files. Host Integration Server 2000 ---------------------------- 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 Host Integration Server 2000 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: 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 above files may also contain additional files. STATUS ====== SNA Server 4.0 -------------- Microsoft has confirmed this to be 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 this to be a problem in Host Integration Server 2000. 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 ====================================================================== Keywords : sna4 kbsna400sp1 kbsna400sp2 kbsna400sp3 kbhis2000 kbhis2000bug kbsna400sp4 Technology : kbAudDeveloper kbSNAServSearch kbHostIntegServ2000 kbSNAServ400 kbSNAServ400SP1 kbSNAServ400SP2 kbSNAServ400SP3 kbSNAServ400SP4 Version : :4.0,4.0 SP1,4.0 SP2,4.0 SP3,4.0 SP4 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 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