Memory Leak When Using "Keep Alive" Connection and SSL Tunneling

ID: Q216908

The information in this article applies to:

SYMPTOMS

Users and administrators running Internet Explorer may notice a memory leak when connecting to a Web server using a "keep alive" connection.


CAUSE

The memory leak occurs when Wininet.dll tries to select a "keep-alive" connection from the available pool. If there are none available and the maximum number of connections has already been made to the server, one of the current connections is destroyed. If a Secure Socket Layer (SSL) connection gets destroyed, the secure socket object is often destroyed without cleanly disconnecting the socket connection, resulting in a leak of the security context associated with the secure socket object.


RESOLUTION

A supported fix that corrects this problem is now available from Microsoft, but it has not been fully regression tested and should be applied only to computers experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next service pack that contains this fix.

To obtain this feature 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:

http://www.microsoft.com/support/supportnet/overview/overview.asp
The English version of this fix should have the following file attributes or later:

   Date      Time      Size      File name     Platform
   ------------------------------------------------------
   9/23/98   09:51AM   370,960   Wininet.dll   Windows 95
   9/23/98   10:50AM   370,448   Wininet.dll   Windows NT
NOTE: Due to file dependencies, the most recent hotfix or feature that contains the above files may also contain additional files.


NOTE: If this product was already installed on your computer when you purchased it from the Original Equipment Manufacturer (OEM) and you need this fix, please call the Pay Per Incident number listed on the above Web site. If you contact Microsoft to obtain this fix, and if it is determined that you only require the fix you requested, no fee will be charged. However, if you request additional technical support, and if your no-charge technical support period has expired, or if you are not eligible for standard no-charge technical support, you may be charged a non-refundable fee.

For more information about eligibility for no-charge technical support, see the following article in the Microsoft Knowledge Base:
Q154871 Determining If You Are Eligible for No-Charge Technical Support


STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article.

Additional query words: large 


Keywords          : kbenv msiew95 msient 
Version           : WINDOWS:4.01 Service Pack 1
Platform          : WINDOWS 
Issue type        : kbprb

Last Reviewed: July 2, 1999