[UNIX] XSS and Path Disclosure in Network Query Tool

From: SecuriTeam (support_at_securiteam.com)
Date: 05/04/04

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Date: 4 May 2004 15:43:07 +0200

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      XSS and Path Disclosure in Network Query Tool
    ------------------------------------------------------------------------

    SUMMARY

    " <http://www.shat.net/php/nqt/> Network Query Tool (NQT) is a one-stop
    solution for getting information about a domain or IP address. Instead of
    manually using different UNIX commands or visiting numerous websites to
    "investigate" a host, just load Network Query Tool and enter the hostname
    or IP. NQT does the rest".

    Vulnerabilities in Network Query Tool allow a malicious user to execute
    Cross-site Scripting attack and reveal the complete path of the script.

    DETAILS

    Vulnerable Systems:
     * Network Query Tool (nqt.php) version 1.6

    Path Disclosure:
    Unchecked user submitted variable "portNum":
    http://localhost/nqt.php?target=example.com&queryType=all&portNum=foobar

    Will return the standard PHP error messages, revealing full path to
    script:

    Warning: fsockopen() expects parameter 2 to be long, string given in
    D:\apache_wwwroot\nqt.php on line 305
    Port foobar does not appear to be open.

    This happens since the script does not check validity of the portNum.

    Cross-Site Scripting:
    XSS through unsanitaized user submitted variable "portNum":
    http://localhost/nqt.php?target=foobar.com&queryType=all&portNum=foobar[xss code here]

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:come2waraxe@yahoo.com> Janek
    Vind "waraxe".

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