Forced Call Teardown

• Tools:

• • Teardown - SIP BYE injector
  • • http://www.hackingexposedvoip.com/tools/teardown.tar.gz
  • sip-kill - Injects valid SIP teardown messages into a session
  • • http://skora.net/uploads/media/sip-kill
  • sip-proxykill - Similar technique against SIP proxies
  • • http://skora.net/uploads/media/sip-proxykill
  • IAXHangup
  • • http://website.isecpartners.com/files/IAXHangup.tar.gz
  • H225RegReject
  • • http://website.isecpartners.com/files/h225regreject.tar.gz

• Mitigation:

• • Encrypt the signaling channel
  • Authenticate every signaling message