[NT] SurgeMail Webmail Multiple Vulnerabilities (Directory Traversal, Cross Site Scripting)

From: SecuriTeam (support_at_securiteam.com)
Date: 03/28/05

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Date: 28 Mar 2005 10:28:02 +0200

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      SurgeMail Webmail Multiple Vulnerabilities (Directory Traversal, Cross
    Site Scripting)
    ------------------------------------------------------------------------

    SUMMARY

     <http://netwinsite.com/surgemail/> SurgeMail is a next generation Mail
    Server - Combining features, performance and ease of use into a single
    integrated product. Ideal on Windows NT/2K, or UNIX (Linux, Solaris etc)
    and supports all the standard protocols IMAP, POP3, SMTP, SSL, ESMTP.

    Two vulnerability were found in SurgeMail's Webmail, one in the file
    attachment upload feature and the other in the auto-reply feature. These
    vulnerabilities may be exploited by a malicious Webmail user to upload
    files to certain locations on the server, obtain file listings of certain
    directories, send certain files on the server to him/herself and/or place
    a JavaScript code inside an auto-replay feature in the Header and subject
    input fields.

    DETAILS

    Vulnerable Systems:
     * SurgeMail version 2.2g3

    Immune Systems:
     * SurgeMail version 3.0c2

    Directory Traversal:
    SurgeMail allows a logged user to attach files when composing a new email
    via the Webmail interface.

    The uploaded file is temporarily stored in the
    c:\surgemail\web_work\u_xx\xxxx@hostname@hostname\attach\RandomNumber\
    directory. In particular, the value of SomeRandomNumber is part of this
    POST request (attach_id parameter) and is under the attacker's control.

    The server will create the directory "RandomNumber" if it does not exist.
    By using directory traversal characters, it is possible to cause the
    uploaded files to be written to directories that reside outside the attach
    subdirectory.

    Cross Site Scripting:
    A user is allowed to configure an email auto-reply message using the
    Webmail interface. This auto-reply message consist of a message subject
    and a message header. It is possible to inject JavaScript in both these
    fields. If the Webmail administrator views this user's auto-reply message
    settings, the injected JavaScript will be executed on his browser. This
    may be exploited by a malicious user to steal the Webmail administrator's
    cookies or to redirect the administrator's browser to malicious websites.

    Another XSS vulnerability occurs when webmail.exe is displaying an error
    message in response to an invalid value in the page parameter. The error
    message also reveals the installation path.

    Workaround:
    Please update to the latest version of SurgeMail Webmail.

    Disclosure Timeline:
    18 Mar 05 - Vulnerability Discovered
    19 Mar 05 - Vulnerability Verification
    19 Mar 05 - Initial Vendor Notification
    22 Mar 05 - Vendor replied with fixed version
    23 Mar 05 - Public Release

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:chewkeong@security.org.sg>
    chewkeong.
    The original article can be found at:
    <http://www.security.org.sg/vuln/surgemail22g3.html>
    http://www.security.org.sg/vuln/surgemail22g3.html

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