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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2006.0445 -- [Win] eBay Enhanced Picture Services ActiveX control buffer overflow 7 July 2006 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: eBay Enhanced Picture Services ActiveX control versions 1.0.3.36 and prior Publisher: US-CERT Operating System: Windows Impact: Execute Arbitrary Code/Commands Access: Remote/Unauthenticated CVE Names: CVE-2006-1176 Original Bulletin: http://www.kb.cert.org/vuls/id/597721 - --------------------------BEGIN INCLUDED TEXT-------------------- US-CERT Vulnerability Note VU#597721 eBay Enhanced Picture Services ActiveX control buffer overflow Overview The eBay Enhanced Picture Services (EPUImageControl Class) ActiveX control contains a buffer overflow vulnerability. This may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system. I. Description ActiveX ActiveX is a technology that allows programmers to create reusable software components that can be incorporated into applications to extend their functionality. Internet Explorer is a common Windows application that makes use of ActiveX controls. eBay Enhanced Picture Services The eBay Enhanced Picture Services control is an ActiveX control that allows a seller to upload pictures to an auction. It is provided by the file EUPWALcontrol.dll and the COM object is named "EPUImageControl Class." The eBay Enhanced Picture Services control is available in the following eBay products: * eBay.com: Sell Your Item (SYI), Setup & Test eBay Enhanced Picture Services, Picture Manager Enhanced Uploader * CARad.com: Add Vehicle * Older, unsupported versions of eBay SDK. The control does not ship in supported versions of the SDK. Sellers who have installed the eBay ActiveX control on Windows (98, ME, NT, 2000, XP, 2003, etc.) are vulnerable. eBay has provided the following steps to determine if the Enhanced Picture Services ActiveX control is installed: 1. Launch Internet Explorer 2. Select Tools -> Internet Options 3. Click "Settings..." button in the "Temporary Internet files" group 4. Click on "View Objects..." 5. This will launch Windows Explorer. In the Program File column you should see "EPUImageControl Class" . If you don't see this file, then the ActiveX is not installed. Otherwise right click on name, select the Version tab to see the ActiveX version The Problem The eBay Enhanced Picture Services ActiveX control version 1.0.3.36 and earlier contain a buffer overflow vulnerability. II. Impact By convincing a user to view a specially crafted HTML document (e.g., a web page or an HTML email message or attachment), an attacker may be able to execute arbitrary code with the privileges of the user. The attacker could also cause Internet Explorer (or the program using the WebBrowser control) to crash. III. Solution Upgrade or patch This vulnerability is addressed in version 1.0.3.48 and later of the eBay Enhanced Picture Services ActiveX control. According to eBay: Sellers will automatically be prompted to update if they go through any eBay flow that utilizes the ActiveX control, including, but not limited to: o In My eBay users will be prompted to update on the "Setup & Test eBay Enhanced Picture Services" page when selecting eBay Enhanced Picture Services under "My Account > Preferences > Sell Your Item Picture Preference" o In My eBay Picture Manager and in all versions of SYI (Sell Your Item), Picture Manager subscribers will receive the update when clicking Add Pictures and selecting Enhanced Uploader if the Enhanced Uploader is not already the user default. o On CARad.com, users will receive the update when clicking the Picture Manager within the "Add Vehicle" flow. o The eBay Developer site will advise eBay SDK developers on how to update old, unsupported versions of the SDK that contain the ActiveX Control. Remove the eBay Enhanced Picture Services ActiveX control The eBay Enhanced Picture Services ActiveX control can be removed by taking the following steps: 1. Launch Internet Explorer 2. Select Tools -> Internet Options 3. Click the "Settings..." button in the "Temporary Internet files" group 4. Click on "View Objects..." 5. This will launch Windows Explorer. In the Program File column you should see "EPUImageControl Class". 6. Right click and "Remove" the ActiveX control. 7. Return to the Internet Options, close the "Settings" window. 8. Under "Internet Options", "Temporary Internet files", click "Delete Files" to delete any locally cached copies of the ActiveX control. Disable ActiveX Disabling ActiveX controls in the Internet Zone (or any zone used by an attacker) appears to prevent exploitation of this vulnerability. Instructions for disabling ActiveX in the Internet Zone can be found in the "Securing Your Web Browser" document and the Malicious Web Scripts FAQ. Disable the eBay Enhanced Picture Services ActiveX control The eBay Enhanced Picture Services ActiveX control can be disabled by setting the kill bit for the following CLSID: {4C39376E-FA9D-4349-BACC-D305C1750EF3} More information about how to set the kill bit is available in Microsoft Support Document 240797. http://support.microsoft.com/kb/240797 Systems Affected Vendor Status Date Updated eBay Vulnerable 6-Jul-2006 References http://pages.ebay.com/picture_manager/ http://www.microsoft.com/com/default.mspx http://www.us-cert.gov/reading_room/securing_browser/#Internet_Explorer Credit This vulnerability was reported by Will Dormann This document was written by Will Dormann. Other Information Date Public 06/21/2006 Date First Published 07/06/2006 02:07:27 PM Date Last Updated 07/06/2006 CERT Advisory CVE Name CVE-2006-1176 Metric 2.53 Document Revision 22 - --------------------------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. 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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 iQCVAwUBRK4C1ih9+71yA2DNAQKqVAP/YPk6dc5/GB0cFEqdE5TFLEuoV2FUPdPq 6PGLMxVgs9IYf5fHw5QsZknGONMuU7yCCIi2GszJ7NsOIBKF4bvnQKeo2KLGcyHh cVxxeaD4ItAcXtQ8YZ+Wdf2kfxpyiPpAxukYaL8XIDZucHSZWoHYY+1UxF7IyfdG yHiSquIpW2M= =3q0m -----END PGP SIGNATURE-----