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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 <alfredo@yersinia.net>
       David Barroso Berrueta <tomac@yersinia.net>



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