From secnotif@MICROSOFT.COM Tue Nov 13 21:17:14 2001 From: Microsoft Product Security To: MICROSOFT_SECURITY@ANNOUNCE.MICROSOFT.COM Date: Tue, 13 Nov 2001 16:33:55 -0800 Subject: Microsoft Security Bulletin MS01-054 (Version 2.0) The following is a Security Bulletin from the Microsoft Product Security Notification Service. Please do not reply to this message, as it was sent from an unattended mailbox. ******************************** -----BEGIN PGP SIGNED MESSAGE----- - ---------------------------------------------------------------------- Title: Invalid Universal Plug and Play Request can Disrupt System Operation Released: 01 November 2001 Revised: 13 November 2001 Software: Windows 98, Windows ME, Windows XP Impact: Denial of Service Max Risk: low Bulletin: MS01-054 Microsoft encourages customers to review the Security Bulletin at: http://www.microsoft.com/technet/security/bulletin/MS01-0xx.asp. - ---------------------------------------------------------------------- Reason for Revision: ==================== On November 08, 2001 Microsoft discovered that the Windows ME patch failed to properly register the upnp.dll. On November 13, 2001, Microsoft released a corrected version of the Windows ME patch. Microsoft recommends that customers who installed the original Windows ME patch download and install the new one. Customers using other systems do not need to take any additional action, as only the Windows ME patch contained the error. Issue: ====== The Universal Plug and Play (UPnP) service allows computers to discover and use network-based devices. Windows ME and XP include native UPnP services; Windows 98 and 98SE do not include a native UPnP service, but one can be installed via the Internet Connection Sharing client that ships with Windows XP. A vulnerability results because the UPnP service does not correctly handle certain types of invalid UPnP requests. On Windows 98, 98SE, and ME systems, receiving such a request could cause a variety of effects ranging from slow performance to system failure. On Windows XP, the effect is less serious as the flaw consists of a memory leak. Each time a Windows XP system received such a request, a small amount of system memory would become unavailable; if repeated many times, it could deplete system resources to the point where performance slowed or stopped altogether. Mitigating Factors: ==================== - Standard firewalling practices (specifically, blocking ports 1900 and 5000) could be used to protect corporate networks from Internet-based attacks. - On Windows 98 and 98SE, there is no native UPnP support for these systems. Windows 98 and 98SE systems would only be affected if the Internet Connection Sharing Client from Windows XP had been installed on the system. - On Windows ME, UPnP supportis neither installed nor running by default. (However, some OEMs do configure pre-built systems with the service installed and running). - On Windows XP, the Internet Connection Firewall, which runs by default, would impede an attacker's ability to locate and attack the system. Risk Rating: ============ - Internet systems: Low - Intranet systems: Low - Client systems: Low Patch Availability: =================== - A patch is available to fix this vulnerability. Please read the Security Bulletin at http://www.microsoft.com/technet/security/bulletin/ms01-054.asp for information on obtaining this patch. Acknowledgment: =============== - 'Ken' from FTU (franklin_tech_unlimited@yahoo.com) - --------------------------------------------------------------------- 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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