Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0335 -- [Win] Macrovision InstallShield InstallScript One-Click Install Untrusted Library Loading Vulnerability 2 April 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Macrovision InstallShield InstallScript One-Click Install ActiveX Control Publisher: iDefense Operating System: Windows Impact: Execute Arbitrary Code/Commands Access: Remote/Unauthenticated CVE Names: CVE-2007-5661 Original Bulletin: http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=649 - --------------------------BEGIN INCLUDED TEXT-------------------- iDefense Security Advisory 03.31.08 http://labs.idefense.com/intelligence/vulnerabilities/ Mar 31, 2008 I. BACKGROUND Macrovision InstallShield InstallScript One-Click Install (OCI) is a web based installer technology that allows software publishers to distribute minimal installer packages which allow end users to select components to install. Upon first visiting such a website, the user is prompted to install the ActiveX control. More information can be found on the vendor's site at the following URL. http://www.macrovision.com/products/installation/installshield.htm II. DESCRIPTION Remote exploitation of an untrusted library loading vulnerability in Macrovision's InstallShield InstallScript One-Click Install ActiveX control allows remote attackers to execute code with the privileges of the currently logged in user. InstallShield InstallScript "One-Click Install" is implemented in an ActiveX control with the following properties: File: %WINDIR%\Downloaded Program Files\setup.exe CLSID: 53D40FAA-4E21-459f-AA87-E4D97FC3245A This control is marked "safe for scripting". When a user visits a website from which a web install can be performed, the ActiveX control downloads and loads several DLL files from the remote website. Since no sanity checks are performed on the DLL files, an attacker can substitute specially crafted libraries that will execute arbitrary code when loaded. III. ANALYSIS Exploitation allows attackers to execute arbitrary code with the privileges of the currently logged-in user. In order for exploitation to occur, users would be required to have a vulnerable version of the ActiveX control installed and be lured to a malicious site. IV. DETECTION iDefense confirmed this vulnerability exists in version 12.0 of the Macrovision InstallShield InstallScript One-Click Install ActiveX Control. Previous versions of the control are reported to be vulnerable to variations of this attack. Previous versions are known to use different CLSIDs. V. WORKAROUND Administrators can set the kill-bit for the vulnerable ActiveX control with the following .reg file. This will prevent the control from loading within Internet Explorer. Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{53D40FAA-4E21-459f-AA87-E4D97FC3245A}] "Compatibility Flags"=dword:00000400 VI. VENDOR RESPONSE Macrovision has addressed this vulnerability by releasing a hotfix for the following products. FLEXnet InstallShield 12 Professional (with InstallShield 12 SP2) FLEXnet InstallShield 12 Premier (with InstallShield 12 SP2) For more information, consult their Knowledge Base article at the following URL. http://knowledge.macrovision.com/selfservice/microsites/search.do?cmd=displayKC&externalId=Q113640 VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-5661 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems. VIII. DISCLOSURE TIMELINE 01/08/2007 Initial vendor notification 04/17/2007 Second vendor notification 04/18/2007 Initial vendor response 03/31/2008 Coordinated public disclosure IX. CREDIT The discoverer of this vulnerability wishes to remain anonymous. Get paid for vulnerability research http://labs.idefense.com/methodology/vulnerability/vcp.php Free tools, research and upcoming events http://labs.idefense.com/ X. LEGAL NOTICES Copyright © 2008 iDefense, Inc. Permission is granted for the redistribution of this alert electronically. It may not be edited in any way without the express written consent of iDefense. If you wish to reprint the whole or any part of this alert in any other medium other than electronically, please e-mail customerservice@idefense.com for permission. Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBR/LqXCh9+71yA2DNAQJX7wP8C3mhVaAOdGopM5WRqDdK7J30cOHvCeR3 O9M5LetBeq/HbfHir/ctJKdEgqiWKWB9XEVadQFYPwX2iX1KWIu1t95e4yBvOHLA Pohd8rLYky5Fdc+Ncpi8R0udvzO3u43coNUQLEru3X4uste0sXNcBE3ndkfQAJ6n yzPPhC2MOUU= =0ud6 -----END PGP SIGNATURE-----