Network vulnerabilities check software

 Yersinia is a framework for performing layer 2 attacks. It is designed
 to take advantage of some weakeness in different network protocols. It
 pretends to be a solid framework for analyzing and testing the deployed
 networks and systems.
 .
 Attacks for the following network protocols are implemented in this
 particular release:
  - Spanning Tree Protocol (STP).
  - Cisco Discovery Protocol (CDP).
  - Dynamic Trunking Protocol (DTP).
  - Dynamic Host Configuration Protocol (DHCP).
  - Hot Standby Router Protocol (HSRP).
  - 802.1q.
  - 802.1x.
  - Inter-Switch Link Protocol (ISL).
  - VLAN Trunking Protocol (VTP).