Microsoft KB Archive/331904

= A Memory Leak Occurs in the SnmpMgrGetTrap Function When It Receives Very Large Packets =

Article ID: 331904

Article Last Modified on 10/27/2006

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APPLIES TO


 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional

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This article was previously published under Q331904



SYMPTOMS
A memory leak occurs in the SNMP trap-handling SnmpMgrGetTrap function when the function receives very large packets. This memory leak allows Snmptrap to dispatch SNMP packets that are larger than 8,192 bytes. Therefore, large malformed packets are permitted to reach the SnmpMgrGetTrap function, which handles them incorrectly.



Service pack information
To resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

322389 How to obtain the latest Windows XP service pack

Hotfix information
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 Windows XP 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/contactus/?ws=support

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 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     Platform --  18-Nov-2002  13:20  5.1.2600.106   12,800  Mgmtapi.dll   x86 pre-SP1 18-Nov-2002 18:42  5.1.2600.1143  12,800  Mgmtapi.dll   x86 with SP1 18-Nov-2002 13:20  5.1.2600.106   40,960  Mgmtapi.dll   IA64 pre-SP1 15-Nov-2002 14:10  5.1.2600.106   12,800  Wmgmtapi.dll  IA64 pre-SP1 18-Nov-2002 18:42  5.1.2600.1143  40,960  Mgmtapi.dll   IA64 with SP1 15-Nov-2002 14:00  5.1.2600.1143  12,800  Wmgmtapi.dll  IA64 with SP1



WORKAROUND
To work around this problem, use the SnmpMgrGetTrapEx function instead of the SnmpMgrGetTrap function.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft Windows XP Service Pack 2.

Keywords: kbhotfixserver kbqfe kbwinxpsp2fix kbqfe kbbug kbfix kbwinxppresp2fix KB331904

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