[ SOURCE: http://www.secureroot.com/security/advisories/9735365435.html ] -----BEGIN PGP SIGNED MESSAGE----- Microsoft Security Bulletin (MS00-075) - -------------------------------------- Patch Available for "Microsoft VM ActiveX Component" Vulnerability Originally posted: October 12, 2000 Summary ======= Microsoft has released a patch that eliminates a security vulnerability in Microsoft(r) virtual machine (Microsoft VM). If a malicious web site operator were able to coax a user into visiting his site, the vulnerability could allow him to take any desired action on a visiting user's machine. Frequently asked questions regarding this vulnerability and the patch can be found at http://www.microsoft.com/technet/security/bulletin/fq00-075.asp Issue ===== The Microsoft VM is a virtual machine for the Win32(r) operating environment. It runs atop Microsoft(r) Windows 95, 98, Windows Me, Windows NT 4.0, or Windows 2000. It ships as part of each operating system, and also as part of Microsoft Internet Explorer. The version of the Microsoft VM that ships with Microsoft Internet Explorer 4.x and Internet Explorer 5.x contains a security vulnerability that could allow a Java applet, on a malicious web site to take any desired action on a visiting user's machine. The Microsoft virtual machine (Microsoft VM) contains functionality that allows ActiveX controls to be created and manipulated by Java applications or applets. This functionality is intended to only be available to stand-alone Java applications or digitally signed applets. However, this vulnerability allows ActiveX controls to be created and used from a web page, or from within a HTML based e-mail message, without requiring a signed applet. If a user visited a malicious web site that exploited this vulnerability, a Java applet on one of the web pages could run any desired ActiveX control, even ones that are marked as unsafe for scripting. This would enable the malicious web site operator to take any desired action on the user's machine. Web sites placed within the Restricted Sites zone in Internet Explorer will not be able to exploit this vulnerability. Affected Software Versions ========================== Versions of the Microsoft VM are identified by build numbers, which can be determined using the JVIEW tool, as discussed in the FAQ. The following builds of the Microsoft VM are affected: - All builds in the 2000 series. - All builds in the 3100 series. - All builds in the 3200 series. - All builds in the 3300 series. Patch Availability ================== - 2000-series Microsoft VM customers will be provided with an update soon. - 3100-series Microsoft VM customers upgrade to build 3318 or later from: http://www.microsoft.com/java/vm/dl_vm40.htm - 3200-series Microsoft VM customers upgrade to build 3318 or later from: http://www.microsoft.com/java/vm/dl_vm40.htm - 3300-series Microsoft VM customers upgrade to build 3318 or later from: http://www.microsoft.com/java/vm/dl_vm40.htm This fix supersedes the patch supplied in MS00-059 Note Additional security patches are available at the Microsoft Download Center More Information ================ Please see the following references for more information related to this issue. - Frequently Asked Questions: Microsoft Security Bulletin MS00-75, http://www.microsoft.com/technet/security/bulletin/fq00-075.asp - Microsoft Knowledge Base (KB) article Q275609, http://www.microsoft.com/technet/support/kb.asp?ID=275609 discusses this issue in more detail. - Microsoft TechNet Security web site, http://www.microsoft.com/technet/security/default.asp Obtaining Support on this Issue =============================== This is a fully supported patch. Information on contacting Microsoft Product Support Services is available at http://support.microsoft.com/support/contact/default.asp. Revisions ========= - October 12, 2000: Bulletin Created. - ------------------------------------------------------------------ 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. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. 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