Yersinia - A Network Exploitation Tool

Yersinia is an open source network tool designed to take advantage of some weaknesses in different network protocols. It is capable of many diverse attacks over multiple protocols, such as becoming the root role in the Spanning Tree (Spanning Tree Protocol), creating virtual CDP (Cisco Discovery Protocol) neighbors, becoming the active router in a HSRP (Hot Standby Router Protocol) scenario, faking DHCP replies, and other low-level attacks.

Features:

100% written in C.
It uses libpcap, libnet and ncurses.
Runs on Linux, BSD and Solaris, Mac OSX
Multithreaded: it supports multiple users and multiple attacks per user.
Examine, analyze and watch your packets
Edit each protocol's fields
Capture your network data in pcap format.
Customize your preferences in a configuration file.
Monitor and capture packets from the network and replay them with your modifications.
Three main modes: command line, network client and ncurses GUI

Attacks for the following protocols are implemented in the latest 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)

Attacks

Spanning Tree Protocol:

Sending RAW Configuration BPDU
Sending RAW TCN BPDU
DoS sending RAW Configuration BPDU
DoS sending RAW TCN BPDU
Claiming Root Role
Claiming Other Role
Claiming Root Role dual home (MITM)

Cisco Discovery Protocol:

Sending RAW CDP packet
DoS flooding CDP neighbors table
Setting up a virtual device

Dynamic Host Configuration Protocol:

Sending RAW DHCP packet
DoS sending DISCOVER packet (exhausting ip pool)
Setting up rogue DHCP server
DoS sending RELEASE packet (releasing assigned ip)

Hot Standby Router Protocol:

Sending RAW HSRP packet
Becoming active router
Becoming active router (MITM)

Dynamic Trunking Protocol:

Sending RAW DTP packet
Enabling trunking
802.1Q
Sending RAW 802.1Q packet
Sending double encapsulated 802.1Q packet
Sending 802.1Q ARP Poisoning
802.1X
Sending RAW 802.1X packet
Mitm 802.1X with 2 interfaces

VLAN Trunking Protocol:

Sending RAW VTP packet
Deleting ALL VLANs
Deleting selected VLAN
Adding one VLAN
Catalyst crash

Usage:

  yersinia [-hVGIDd] [-l logfile] [-c conffile] protocol [protocol_options]

-V Program version.
-h This help screen.
-G Graphical mode (GTK).
-I Interactive mode (ncurses).
-D Daemon mode.
-d Debug.
-l logfile Select logfile.
-c conf-file Select config file.