[NT] Microsoft Windows XP RPC Cache Memory Leak Vulnerabiliry
SecuriTeam <[email protected]>
| Newsgroups | gmane.comp.security.securiteam |
|---|---|
| Message-ID | <[email protected]> |
The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com - - promotion The SecuriTeam alerts list - Free, Accurate, Independent. Get your security news from a reliable source. http://www.securiteam.com/mailinglist.html - - - - - - - - - Microsoft Windows XP RPC Cache Memory Leak Vulnerabiliry ------------------------------------------------------------------------ SUMMARY When you run a program that uses the Windows Management Instrumentation (WMI) service in Microsoft Windows XP, the memory that is used by a remote procedure call (RPC) cache may not be freed, and a memory leak may occur. The RPC cache may grow so large that it causes the program and Windows XP to become unresponsive. DETAILS Vulnerable Systems: * Rpcrt4.dll library version 5.1.2600.2575 and prior This problem may occur if many expired and unused security contexts are generated every second. (Security contexts are generated by the program that you are running.) The RPC cache is cleaned up at a rate of nine security context entries every 10 seconds. If the security contexts are generated at a faster rate than the cache is cleaned up, the cache grows larger and eventually causes the problem. Vendor Status: A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend 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 hotfix. 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;[LN];CNTACTMS> http://support.microsoft.com/default.aspx?scid=fh;[LN];CNTACTMS ADDITIONAL INFORMATION The information has been provided by <mailto:[email protected]> Juha-Matti Laurio . The original article can be found at: <http://support.microsoft.com/kb/890196/EN-US/> http://support.microsoft.com/kb/890196/EN-US/ ======================================== This bulletin is sent to members of the SecuriTeam mailing list. To unsubscribe from the list, send mail with an empty subject line and body to: [email protected] In order to subscribe to the mailing list, simply forward this email to: [email protected] ==================== ==================== DISCLAIMER: The information in this bulletin is provided "AS IS" without warranty of any kind. In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.