[NT] RAV Online Scanning ActiveX Buffer Overflow

From: SecuriTeam (support_at_securiteam.com)
Date: 07/20/03

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Date: 20 Jul 2003 19:50:54 +0200

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      RAV Online Scanning ActiveX Buffer Overflow
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.ravantivirus.com/index.php> RAV Online Scanning is "a free
    antivirus scanner for internet users. It is run on the user's browsers as
    an ActiveX".

    The ActiveX file called ravonline.dll has a function named
    browseForFolder() that can be overflowed by passing a very long string as
    an argument. Since the function browseForFolder() is imported from
    Shell32.dll, so it looks like the problem maybe lay in the Shell32.dll and
    not in the ActiveX itself however users that use RAV Online Scanning are
    still vulnerable to the overflow.

    DETAILS

    Workaround:
    Delete the ActiveX (ravonline.dll) in the "Downloaded Program Files" in
    your Windows Directory.

    Vendor status:
    The vendor has been notified of the issue, no response have been received
    until now.

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:trihuynh@zeeup.com> Tri
    Huynh.

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