Provided by: yersinia_0.8.2-2.1build1_amd64 
NAME
Yersinia - A Framework for layer 2 attacks
SYNOPSIS
yersinia [-hVGIDd] [-l logfile] [-c conffile] protocol [-M] [protocol_options]
DESCRIPTION
yersinia is a framework for performing layer 2 attacks. The following protocols have been implemented in
Yersinia current version: Spanning Tree Protocol (STP), VLAN Trunking Protocol (VTP), Hot Standby Router
Protocol (HSRP), Dynamic Trunking Protocol (DTP), IEEE 802.1Q, IEEE 802.1X, Cisco Discovery Protocol
(CDP), Dynamic Host Configuration Protocol (DHCP), Inter-Switch Link Protocol (ISL) and MultiProtocol
Label Switching (MPLS).
Some of the attacks implemented will cause a DoS in a network, other will help to perform any other more
advanced attack, or both. In addition, some of them will be first released to the public since there
isn't any public implementation.
Yersinia will definitely help both pen-testers and network administrators in their daily tasks.
Some of the mentioned attacks are DoS attacks, so TAKE CARE about what you're doing because you can
convert your network into an UNSTABLE one.
A lot of examples are given at this page EXAMPLES section, showing a real and useful program execution.
OPTIONS
-h, --help
Help screen.
-V, --Version
Program version.
-G Start a graphical GTK session.
-I, --interactive
Start an interactive ncurses session.
-D, --daemon
Start the network listener for remote admin (Cisco CLI emulation).
-d Enable debug messages.
-l logfile
Save the current session to the file logfile. If logfile exists, the data will be appended at the
end.
-c conffile
Read/write configuration variables from/to conffile.
-M Disable MAC spoofing.
PROTOCOLS
The following protocols are implemented in yersinia current version:
Spanning Tree Protocol (STP and RSTP)
Cisco Discovery Protocol (CDP)
Hot Standby Router Protocol (HSRP)
Dynamic Host Configuration Protocol (DHCP)
Dynamic Trunking Protocol (DTP)
IEEE 802.1Q
VLAN Trunking Protocol (VTP)
Inter-Switch Link Protocol (ISL)
IEEE 802.1X
MultiProtocol Label Switching (MPLS)
PROTOCOLS OPTIONS
Spanning Tree Protocol (STP): is a link management protocol that provides path redundancy while
preventing undesirable loops in the network. The supported options are:
-version version
BPDU version (0 STP, 2 RSTP, 3 MSTP)
-type type
BPDU type (Configuration, TCN)
-flags flags
BPDU Flags
-id id BPDU ID
-cost pathcost
BPDU root path cost
-rootid id
BPDU Root ID
-bridgeid id
BPDU Bridge ID
-portid id
BPDU Port ID
-message secs
BPDU Message Age
-max-age secs
BPDU Max Age (default is 20)
-hello secs
BPDU Hello Time (default is 2)
-forward secs
BPDU Forward Delay
-source hw_addr
Source MAC address
-dest hw_addr
Destination MAC address
-interface iface
Set network interface to use
-attack attack
Attack to launch
Cisco Discovery Protocol (CDP): is a Cisco propietary Protocol which main aim is to let Cisco devices to
communicate to each other about their device settings and protocol configurations. The supported options
are:
-source hw_addr
MAC Source Address
-dest hw_addr
MAC Destination Address
-v version
CDP Version
-ttl ttl
Time To Live
-devid id
Device ID
-address address
Device Address
-port id
Device Port
-capability cap
Device Capabilities
-version version
Device IOS Version
-duplex 0|1
Device Duplex Configuration
-platform platform
Device Platform
-ipprefix ip
Device IP Prefix
-phello hello
Device Protocol Hello
-mtu mtu
Device MTU
-vtp_mgm_dom domain
Device VTP Management Domain
-native_vlan vlan
Device Native VLAN
-voip_vlan_r req
Device VoIP VLAN Reply
-voip_vlan_q query
Device VoIP VLAN Query
-t_bitmap bitmap
Device Trust Bitmap
-untrust_cos cos
Device Untrusted CoS
-system_name name
Device System Name
-system_oid oid
Device System ObjectID
-mgm_address address
Device Management Address
-location location
Device Location
-attack attack
Attack to launch
Hot Standby Router Protocol (HSRP):
-source hw_addr
Source MAC address
-dest hw_addr
Destination MAC address
-interface iface
Set network interface to use
-attack attack
Attack to launch
Inter-Switch Link Protocol (ISL):
-source hw_addr
Source MAC address
-dest hw_addr
Destination MAC address
-interface iface
Set network interface to use
-attack attack
Attack to launch
VLAN Trunking Protocol (VTP):
-source hw_addr
Source MAC address
-dest hw_addr
Destination MAC address
-interface iface
Set network interface to use
-attack attack
Attack to launch
Dynamic Host Configuration Protocol (DHCP):
-source hw_addr
Source MAC address
-dest hw_addr
Destination MAC address
-interface iface
Set network interface to use
-attack attack
Attack to launch
IEEE 802.1Q:
-source hw_addr
Source MAC address
-dest hw_addr
Destination MAC address
-interface iface
Set network interface to use
-attack attack
Attack to launch
Dynamic Trunking Protocol (DTP):
-source hw_addr
Source MAC address
-dest hw_addr
Destination MAC address
-interface iface
Set network interface to use
-attack attack
Attack to launch
IEEE 802.1X:
-version arg
Version
-type arg
xxxx
-eapcode arg
xxxx
-eapid arg
xxxx
-eaptype arg
xxxx
-eapinfo arg
xxx
-interface arg
xxxx
-source hw_addr
Source MAC address
-dest hw_addr
Destination MAC address
-interface iface
Set network interface to use
-attack attack
Attack to launch
MultiProtocol Label Switching (MPLS):
-source hw_addr
Source MAC address
-dest hw_addr
Destination MAC address
-interface iface
Set network interface to use
-attack attack
Attack to launch
-label1 arg
Set MPLS Label
-exp1 arg
Set MPLS Experimental bits
-bottom1 arg
Set MPLS Bottom Of Stack flag
-ttl1 arg
Set MPLS Time To Live
-label2 arg
Set MPLS Label (second header)
-exp2 arg
Set MPLS Experimental bits (second header)
-bottom2 arg
Set MPLS Bottom Of Stack flag (second header)
-ttl2 arg
Set MPLS Time To Live (second header)
-ipsource ipv4
Source IP
-portsource port
Source TCP/UDP port
-ipdest ipv4
Destination IP
-portdest port
Destination TCP/UDP port
-payload ASCII
ASCII IP payload
ATTACKS
Attacks Implemented in STP:
0: NONDOS attack sending conf BPDU
1: NONDOS attack sending tcn BPDU
2: DOS attack sending conf BPDUs
3: DOS attack sending tcn BPDUs
4: NONDOS attack Claiming Root Role
5: NONDOS attack Claiming Other Role
6: DOS attack Claiming Root Role with MiTM
Attacks Implemented in CDP:
0: NONDOS attack sending CDP packet
1: DOS attack flooding CDP table
2: NONDOS attack Setting up a virtual device
Attacks Implemented in HSRP:
0: NONDOS attack sending raw HSRP packet
1: NONDOS attack becoming ACTIVE router
2: NONDOS attack becoming ACTIVE router (MITM)
Attacks Implemented in DHCP:
0: NONDOS attack sending RAW packet
1: DOS attack sending DISCOVER packet
2: NONDOS attack creating DHCP rogue server
3: DOS attack sending RELEASE packet
Attacks Implemented in DTP:
0: NONDOS attack sending DTP packet
1: NONDOS attack enabling trunking
Attacks Implemented in 802.1Q:
0: NONDOS attack sending 802.1Q packet
1: NONDOS attack sending 802.1Q double enc. packet
2: DOS attack sending 802.1Q arp poisoning
Attacks Implemented in VTP:
0: NONDOS attack sending VTP packet
1: DOS attack deleting all VTP vlans
2: DOS attack deleting one vlan
3: NONDOS attack adding one vlan
4: DOS attack crashing Catalyst
Attacks Implemented in 802.1X:
0: NONDOS attack sending 802.1X packet
1: NONDOS attack Mitm 802.1X with 2 interfaces
Attacks Implemented in MPLS:
0: NONDOS attack sending TCP MPLS packet
1: NONDOS attack sending TCP MPLS with double header
2: NONDOS attack sending UDP MPLS packet
3: NONDOS attack sending UDP MPLS with double header
4: NONDOS attack sending ICMP MPLS packet
5: NONDOS attack sending ICMP MPLS with double header
Attacks Implemented in ISL:
None at the moment
GTK GUI
The GTK GUI (-G) is a GTK graphical interface with all of the yersinia powerful features and a
professional 'look and feel'.
NCURSES GUI
The ncurses GUI (-I) is a ncurses (or curses) based console where the user can take advantage of yersinia
powerful features.
Press 'h' to display the Help Screen and enjoy your session :)
NETWORK DAEMON
The Network Daemon (-D) is a telnet based server (ala Cisco mode) that listens by default in port
12000/tcp waiting for incoming telnet connections.
It supports a CLI similar to a Cisco device where the user (once authenticated) can display different
settings and can launch attacks without having yersinia running in her own machine (specially useful for
Windows users).
EXAMPLES
- Send a Rapid Spanning-Tree BPDU with port role designated, port state agreement, learning and port id
0x3000 to eth1:
yersinia stp -attack 0 -version 2 -flags 5c -portid 3000 -interface eth1
- Start a Spanning-Tree nonDoS root claiming attack in the first nonloopback interface (keep in mind that
this kind of attack will use the first BPDU on the network interface to fill in the BPDU fields
properly):
yersinia stp -attack 4
- Start a Spanning-Tree DoS attack sending TCN BPDUs in the eth0 interface with MAC address
66:66:66:66:66:66:
yersinia stp -attack 3 -source 66:66:66:66:66:66
SEE ALSO
The README file contains more in-depth documentation about the attacks.
COPYRIGHT
Yersinia is Copyright (c)
BUGS
Lots
AUTHORS
Alfredo Andres Omella <aandreswork@hotmail.com>
David Barroso Berrueta <tomac@yersinia.net>