[NT] Norton Internet Security Blocked Sites XSS

From: SecuriTeam (support_at_securiteam.com)
Date: 10/28/03

  • Next message: SecuriTeam: "[TOOL] The Sleuth Kit - UNIX-based File System and Media Management Forensic Analysis Tool" 
    To: list@securiteam.com
Date: 28 Oct 2003 16:56:57 +0200

    The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
    - - promotion

    The SecuriTeam alerts list - Free, Accurate, Independent.

    Get your security news from a reliable source.
    http://www.securiteam.com/mailinglist.html

    - - - - - - - - -

      Norton Internet Security Blocked Sites XSS
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.symantec.com/sabu/nis/nis_pe/index.html> Symantec's Norton
    Internet Security 2003 "provides essential protection from viruses,
    hackers, and privacy threats. Powerful yet easy to use, this award-winning
    suite now includes advanced spam-fighting software to filter unwanted mail
    out of your inbox".

    A cross site scripting vulnerability in the product allows remote
    attackers to cause the product to return arbitrary HTML and/or JavaScript
    inside its Blocked HTML page as if it was the product's HTML and/or
    JavaScript.

    DETAILS

    Vulnerable systems:
     * Norton Internet Security 2003 version 6.0.4.34

    When Norton Internet Security 2003 blocks a web site, it returns a web
    page to the browser stating that the site has been blocked. This error
    message contains the URL that was requested. Norton Internet Security 2003
    appears to do no validation or encoding of the URL before returning it in
    the error message. This allows an attacker to supply a URL that contains
    script. This script will run in the context of the blocked site.

    The HTML returned by Norton Internet Security 2003 when a site is blocked
    looks like the following:
    < html>< head>< title>Site Blocked</title></head><body>
    < br>< b>Norton Internet Security has blocked access to this restricted
    site.</b><br><hr><br>
    < p>< b>Site:
    </b>http://server/page.cgi?< SCRIPT>alert(document.domain)</SCRIPT></p>
    < p>< b>Blocked categories: </b>xxxxxxxxx</p>
    < p>If you think this web site is incorrectly categorized, visit the
    Symantec < a
    href="http://www.symantec.com/avcenter/cgi-bin/nisurl.cgi?lang=EN&unblock=xxxxxxxxx">Internet
    Security Center</a> to report it.</p>
    </body></html>

    Exploit:
    A URL like http://BlockedSite/page.cgi?<
    SCRIPT>alert(document.domain)</SCRIPT> will run script.

    Resolution:
    The fix is now available through the product's LiveUpdate functionality.

    ADDITIONAL INFORMATION

    The information has been provided by
    <mailto:secteam@DIGITALPRANKSTERS.COM> DigitalPranksters.

    ========================================

    This bulletin is sent to members of the SecuriTeam mailing list.
    To unsubscribe from the list, send mail with an empty subject line and body to: list-unsubscribe@securiteam.com
    In order to subscribe to the mailing list, simply forward this email to: list-subscribe@securiteam.com

    ====================
    ====================

    DISCLAIMER:
    The information in this bulletin is provided "AS IS" without warranty of any kind.
    In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.

  • Next message: SecuriTeam: "[TOOL] The Sleuth Kit - UNIX-based File System and Media Management Forensic Analysis Tool"

    Relevant Pages