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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0572 -- [Win] Creative Software AutoUpdate Engine ActiveX stack buffer overflow 2 June 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Creative Software AutoUpdate Publisher: US-CERT Operating System: Windows Impact: Execute Arbitrary Code/Commands Access: Remote/Unauthenticated Original Bulletin: http://www.kb.cert.org/vuls/id/501843 - --------------------------BEGIN INCLUDED TEXT-------------------- Vulnerability Note VU#501843 Creative Software AutoUpdate Engine ActiveX stack buffer overflow Overview The Creative Labs AutoUpdate Engine ActiveX control contains a stack buffer overflow, which can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system. I. Description The Creative Software AutoUpdate Engine ActiveX control is a component that provides automatic update capabilities to Creative Labs software. This ActiveX control is provided by the file CTSUEng.ocx. The Create Software AutoUpdate Engine ActiveX control is marked Safe For Scripting and Safe For Initialization, which means that a web page in Internet Explorer has the ability to interact with the control. This ActiveX control contains a stack buffer overflow in the CacheFolder property. Exploit code for this vulnerability is publicly available. 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. III. Solution We are currently unaware of a practical solution to this problem. Please consider the following workarounds: Disable the Creative Software AutoUpdate ActiveX control in Internet Explorer The vulnerable ActiveX control can be disabled in Internet Explorer by setting the kill bit for the following CLSID: {0A5FD7C5-A45C-49FC-ADB5-9952547D5715} More information about how to set the kill bit is available in Microsoft Support Document 240797. Alternatively, the following text can be saved as a .REG file and imported to set the kill bit for this control: Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{0A5FD7C5-A45C-49FC-ADB5-9952547D5715}] "Compatibility Flags"=dword:00000400 Disable ActiveX Disabling ActiveX controls in the Internet Zone (or any zone used by an attacker) appears to prevent exploitation of this and other ActiveX vulnerabilities. Instructions for disabling ActiveX in the Internet Zone can be found in the "Securing Your Web Browser" document. Systems Affected Vendor Status Date Updated Creative Labs Vulnerable 26-May-2008 References http://www.cert.org/tech_tips/securing_browser/ http://support.microsoft.com/kb/240797 Credit Thanks to Greg Linares of eEye Digital Security for reporting this vulnerability. This document was written by Will Dormann. Other Information Date Public 05/27/2008 Date First Published 05/27/2008 11:04:12 AM Date Last Updated 05/28/2008 CERT Advisory CVE Name CVE-2008-0955 US-CERT Technical Alerts Metric 9.87 Document Revision 16 - --------------------------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. 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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 iQCVAwUBSEORZih9+71yA2DNAQISnQQAkyBnkZC1lDkGKdHXkEl1lznSBOdsIJNF YJJPcsKID2GqezxXNYoLLzwNBxpPuzDfUMBOxvedxYffgtQ3TalTsmJhLXIS+Ftk VEBLk0+YjCi8JIYqtgeBvRrZ2Due7Ry2wiAq1cBEbdKlbR9Y12HorLhS8m+Jkuhi aey6TaWI7yA= =9n6Z -----END PGP SIGNATURE-----