Rapid7 Vulnerability & Exploit Database

ISC DHCP Zero Length ClientID Denial of Service Module

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ISC DHCP Zero Length ClientID Denial of Service Module



This module performs a Denial of Service Attack against the ISC DHCP server, versions 4.1 before 4.1.1-P1 and 4.0 before 4.0.2-P1. It sends out a DHCP Request message with a 0-length client_id option for an IP address on the appropriate range for the dhcp server. When ISC DHCP Server tries to hash this value it exits abnormally.


  • sid
  • theLightCosine <theLightCosine@metasploit.com>


Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':

msf > use auxiliary/dos/dhcp/isc_dhcpd_clientid
msf auxiliary(isc_dhcpd_clientid) > show actions
msf auxiliary(isc_dhcpd_clientid) > set ACTION < action-name >
msf auxiliary(isc_dhcpd_clientid) > show options
    ...show and set options...
msf auxiliary(isc_dhcpd_clientid) > run 

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