Yersinia - is a network security/hacking

Hacker (computer security)

In computer security and everyday language, a hacker is someone who breaks into computers and computer networks. Hackers may be motivated by a multitude of reasons, including profit, protest, or because of the challenge...

 tool for Unix

Unix

Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna...

-like operating systems, designed to take advantage of some weakness in different network protocols. Yersinia is considered a valuable and widely used security tool. As of 2008 Yersinia is still under development with a latest stable version number 0.7.1.

Attacks for the following network protocols are implemented:

• Spanning Tree Protocol
  Spanning tree protocol
  The Spanning Tree Protocol is a network protocol that ensures a loop-free topology for any bridged Ethernet local area network. The basic function of STP is to prevent bridge loops and ensuing broadcast radiation...
  
   (STP)
• Cisco Discovery Protocol
  Cisco Discovery Protocol
  The Cisco Discovery Protocol is a proprietary Data Link Layer network protocol developed by Cisco Systems. It is used to share information about other directly connected Cisco equipment, such as the operating system version and IP address...
  
   (CDP)
• Dynamic Trunking Protocol
  Dynamic Trunking Protocol
  The Dynamic Trunking Protocol is a proprietary networking protocol developed by Cisco Systems for the purpose of negotiating trunking on a link between two VLAN-aware switches, and for negotiating the type of trunking encapsulation to be used. It works on the Layer 2 of the OSI model...
  
   (DTP)
• Dynamic Host Configuration Protocol
  Dynamic Host Configuration Protocol
  The Dynamic Host Configuration Protocol is a network configuration protocol for hosts on Internet Protocol networks. Computers that are connected to IP networks must be configured before they can communicate with other hosts. The most essential information needed is an IP address, and a default...
  
   (DHCP)
• Hot Standby Router Protocol
  Hot Standby Router Protocol
  Hot Standby Router Protocol is a Cisco proprietary redundancy protocol for establishing a fault-tolerant default gateway, and has been described in detail in RFC 2281....
  
   (HSRP)
• IEEE 802.1Q
  IEEE 802.1Q
  IEEE 802.1Q is the networking standard that supports Virtual LANs on an Ethernet network. The standard defines a system of VLAN tagging for Ethernet frames and the accompanying procedures to be used by bridges and switches in handling such frames...
  
  
• IEEE 802.1X
  IEEE 802.1X
  IEEE 802.1X is an IEEE Standard for port-based Network Access Control . It is part of the IEEE 802.1 group of networking protocols. It provides an authentication mechanism to devices wishing to attach to a LAN or WLAN....
  
  
• Cisco Inter-Switch Link
  Cisco Inter-Switch Link
  Cisco Inter-Switch Link is a Cisco Systems proprietary protocol that maintains VLAN information in Ethernet frames as traffic flows between switches and routers, or switches and switches....
  
   (ISL)
• VLAN Trunking Protocol (VTP)

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