AOL YGPPDownload SetAlbumName ActiveX Control Buffer Overflow Vulnerability iDefense Security Advisory 10.11.06 http://www.idefense.com/intelligence/vulnerabilities/ Oct 11, 2006 I. BACKGROUND America Online 9.0 Security Edition builds upon Internet Explorer technology to offer its users enhanced security and usability features. More information can be found on the vendors site at the following URL: http://www.corp.aol.com/products/brands_aol2.shtml II. DESCRIPTION America Online 9.0 Security Edition ships with an ActiveX control which is marked as safe for scripting and contains a buffer overflow vulnerability which allows for the arbitrary execution of code. When AOL 9.0 is installed, it registers the following ActiveX control on the system: ProgId: AOL.PicDownloadCtrl.1 ClassId: D670D0B3-05AB-4115-9F87-D983EF1AC747 File: YGPPicDownload.dll This control is registered as safe for scripting in IE and contains a buffer overflow in its SetAlbumName() method. III. ANALYSIS Exploitation of this vulnerability is trivial and allows for arbitrary execution of code as the currently logged in user. Users would need to be convinced to go to a malicious web site in order to be exploited. IV. DETECTION This vulnerability has been verified in AOL Security Edition 9.0 with downloader plug-in version 9.2.3.0. V. WORKAROUND Disabling Active Scripting or unregistering the vulnerable control can prevent exploitation. Additionally, setting the kill bit for the vulnerable control will disable it from running within Internet Explorer. VI. VENDOR RESPONSE "All AOL software versions are affected by this issue. Solutions 1. Users of AOL 9.0 or AOL 9.0 Security Edition are recommended to log in to the AOL service and a fix will be seamlessly applied to their system. 2. Users using versions of AOL that are older than 9.0 are strongly recommended to upgrade to the latest version of AOL 9.0 Security Edition." VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2006-4840 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 09/11/2006 Initial vendor notification 09/11/2006 Initial vendor response 10/11/2006 Coordinated public disclosure IX. CREDIT The discoverer of this vulnerability wishes to remain anonymous. Get paid for vulnerability research http://www.idefense.com/methodology/vulnerability/vcp.php Free tools, research and upcoming events http://labs.idefense.com/ X. LEGAL NOTICES Copyright © 2006 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 email customerservice@private 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.
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