RAV Online Scanning ActiveX Buffer Overflow in RAVUPDT.DLL ================================================= PROGRAM: RAV ONLINE SCANNING ACTIVEX HOMEPAGE: www.ravantivirus.com VULNERABLE VERSIONS: Online Version Only DESCRIPTION ================================================= RAV Online Scanning is a free antivirus scanner for internet users. It is run on the user's browsers as an ActiveX. DETAILS ================================================= The ActiveX uses a file called RAVUDPT.DLL to handle networking functions. In the main ActiveX file (RAVONLINE.DLL) there is a function named update(serveraddr as string) with serveraddr is the ftp or http address of the database to update. However if update() is passed with a long string, then when the long string is parsed into RAVUDPT.DLL, it will cause a buffer overflow. WORKAROUND ================================================= Delete the old ActiveX(rav*.dll) in the "Downloaded Program Files" in your Windows Directory. Vendor already got noticed but no response yet. CREDITS ================================================= Discovered by Tri Huynh from Sentry Union DISLAIMER ================================================= The information within this paper may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties with regard to this information. In no event shall the author be liable for any damages whatsoever arising out of or in connection with the use or spread of this information. Any use of this information is at the user's own risk. FEEDBACK ================================================= Please send suggestions, updates, and comments to: trihuynhat_private
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