MHT Buffer Overflow in Internet Explorer

By TS | Thomas
Mar 23, 2003
    IE5 introduced the new 'Web Archive' format for storing web pages, which have the extension MHT. The 'Web Archive' saves a web page as a single document complete with all images. The format is a standard mime/multipart e-mail message, a mime decoding program such as 7bit, 8bit & Base 64 decoder should be able to turn it into something usable with your OS & browser of choice.

    This format is pretty nifty & usable, however, there is a potential security breach found when used with encoded executable along with malformed MIME header in the 'Web Archive'. If the encode data is executable or has a single word "MZP" encoded within & Content-Type is not designated, IE5 will be terminated by critical buffer overflow. Consequently, one could compromise the client pc by executing malicious code in the memory.

    Microsoft Internet Explorer 5.5 & 6.0; prior versions are not vulnerable.

    Currently none available.

    Would you like to know more? Thanks PIVX.
  2. warr

    warr TS Rookie Posts: 67

    these days, so many security patches. :blackeye:
  3. TS | Thomas

    TS | Thomas TS Rookie Topic Starter Posts: 1,319

    Unfortunately not :( Microsoft seems to take forever to get around to some things & others they say, well, no by our definition it requires too much interaction to be a security risk. Bah. If you want security Opera seems to have a great record, they actually fix things.
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