ISC DHCP dhcrelay (dhcp-relay) denial of service

dhcp-dhcrelay-dos (11187) The risk level is classified as MediumMedium Risk

Description:

dhcp-relay could allow a remote attacker to launch a denial of service attack against a connected DHCP server. If a remote attacker sends a malicious BOOTP packet to dhcrelay, the packet would be forwarded to a broadcast MAC address, which would cause dhcp-relay to enter into an infinite loop that would send a continuous packet storm towards the affected DHCP server.


Consequences:

Denial of Service

Remedy:

For Debian GNU/Linux:
Upgrade to the latest dhcp3 package, as listed below. Refer to DSA-245-1 for more information. See References.

Debian GNU/Linux 3.0 (woody): 3.0+3.0.1rc9-2.2 or later

For OpenPKG:
Upgrade to the latest dhcpd package, as listed below. Refer to OpenPKG Security Advisory OpenPKG-SA-2003.012 for more information. See References.

OpenPKG CURRENT: 3.0.1rc11-20030219 or later
OpenPKG 1.1: 3.0.1rc9-1.1.2 or later
OpenPKG 1.2: 3.0.1rc11-1.2.1 or later

For Red Hat Linux 8.0:
Upgrade to the latest version of dhcp (3.0pl1-26 or later), as listed in RHSA-2003:034-06. See References.

For Turbolinux:
Upgrade to the latest dhcp package, as listed below. Refer to Turbolinux Security Advisory TLSA-2003-26 for more information. See References.

Turbolinux: 3.0pl2-3 or later

For Conectiva Linux 8:
Upgrade to the latest version of dhcp (3.0-3U80_3cl or later), as listed in Conectiva Linux Security Announcement CLSA-2003:616. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

References:

Platforms Affected:

  • Conectiva Linux 8.0
  • Debian Debian Linux 3.0
  • ISC DHCPd 3.0.1 rc7
  • ISC DHCPd 3.0.1 rc8
  • ISC DHCPd 3.0.1 rc3
  • ISC DHCPd 3.0.1 rc9
  • ISC DHCPd 3.0.1 rc2
  • ISC DHCPd 3.0.1 rc10
  • ISC DHCPd 3.0.1 rc1
  • ISC DHCPd 3.0.1 rc6
  • ISC DHCPd 3.0.1 rc5
  • ISC DHCPd 3.0.1 rc4
  • OpenPKG OpenPKG 1.1
  • OpenPKG OpenPKG 1.2
  • OpenPKG OpenPKG CURRENT
  • RedHat Linux 7
  • RedHat Linux 7.1
  • RedHat Linux 7.2
  • RedHat Linux 7.3
  • RedHat Linux 8.0
  • Turbolinux Turbolinux 8 Server
  • Turbolinux Turbolinux 8 Workstation

Reported:

Jan 15, 2003

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