[NEWS] Opera Mail Client Attachment Spoofing and Script Injection

From: SecuriTeam (support_at_securiteam.com)
Date: 09/27/05

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    To: list@securiteam.com
Date: 27 Sep 2005 16:07:54 +0200

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      Opera Mail Client Attachment Spoofing and Script Injection
    ------------------------------------------------------------------------

    SUMMARY

    " <http://www.opera.com/> Opera is a full-featured Internet power tool on
    the market, Opera includes pop-up blocking, tabbed browsing, integrated
    searches, E-mail, RSS Newsfeeds and IRC chat."

    Lack of prover input validation allows attackers to insert arbitrary code
    and execute it in Opera Mail.

    DETAILS

    Vulnerable Systems:
     * Opera version 8.02

    Immune Systems:
     * Opera version 8.50

    Two vulnerabilities in Opera Mai client, can be exploited by a malicious
    person to conduct script insertion attacks and to spoof the name of
    attached files.

     1. Attached files are opened without any warnings directly from the
    user's cache directory. This can be exploited to execute arbitrary
    JavaScript in context of "file://".
     2. Normally, filename extensions are determined by the "Content-Type" in
    Opera Mail. However, by appending an additional '.' to the end of a
    filename, an HTML file could be spoofed to be e.g. "image.jpg.".

    The two vulnerabilities combined may be exploited to conduct script
    insertion attacks if the user chooses to view an attachment named e.g.
    "image.jpg." e.g. resulting in disclosure of local files.

    Disclosure Timeline:
    01/09/2005 - Initial vendor notification
    20/09/2005 - Public disclosure

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:vuln@secunia.com> Secunia
    Research .
    The original article can be found at:
    <http://secunia.com/advisories/16645/>
    http://secunia.com/advisories/16645/

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