=========================================================================Ubuntu Security Notice USN-2868-1
January 13, 2016

isc-dhcp vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 15.10
- Ubuntu 15.04
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

DHCP server, client, or relay could be made to crash if they received
specially crafted network traffic.

Software Description:
- isc-dhcp: DHCP server and client

Details:

Sebastian Poehn discovered that the DHCP server, client, and relay
incorrectly handled certain malformed UDP packets. A remote attacker could
use this issue to cause the DHCP server, client, or relay to stop
responding, resulting in a denial of service.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 15.10:
  isc-dhcp-client                 4.3.1-5ubuntu3.1
  isc-dhcp-relay                  4.3.1-5ubuntu3.1
  isc-dhcp-server                 4.3.1-5ubuntu3.1
  isc-dhcp-server-ldap            4.3.1-5ubuntu3.1

Ubuntu 15.04:
  isc-dhcp-client                 4.3.1-5ubuntu2.3
  isc-dhcp-relay                  4.3.1-5ubuntu2.3
  isc-dhcp-server                 4.3.1-5ubuntu2.3
  isc-dhcp-server-ldap            4.3.1-5ubuntu2.3

Ubuntu 14.04 LTS:
  isc-dhcp-client                 4.2.4-7ubuntu12.4
  isc-dhcp-relay                  4.2.4-7ubuntu12.4
  isc-dhcp-server                 4.2.4-7ubuntu12.4
  isc-dhcp-server-ldap            4.2.4-7ubuntu12.4

Ubuntu 12.04 LTS:
  isc-dhcp-client                 4.1.ESV-R4-0ubuntu5.10
  isc-dhcp-relay                  4.1.ESV-R4-0ubuntu5.10
  isc-dhcp-server                 4.1.ESV-R4-0ubuntu5.10
  isc-dhcp-server-ldap            4.1.ESV-R4-0ubuntu5.10

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-2868-1
  CVE-2015-8605

Package Information:
  https://launchpad.net/ubuntu/+source/isc-dhcp/4.3.1-5ubuntu3.1
  https://launchpad.net/ubuntu/+source/isc-dhcp/4.3.1-5ubuntu2.3
  https://launchpad.net/ubuntu/+source/isc-dhcp/4.2.4-7ubuntu12.4
  https://launchpad.net/ubuntu/+source/isc-dhcp/4.1.ESV-R4-0ubuntu5.10

Ubuntu 2868-1: DHCP vulnerability

January 13, 2016
DHCP server, client, or relay could be made to crash if they received specially crafted network traffic.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 15.10: isc-dhcp-client 4.3.1-5ubuntu3.1 isc-dhcp-relay 4.3.1-5ubuntu3.1 isc-dhcp-server 4.3.1-5ubuntu3.1 isc-dhcp-server-ldap 4.3.1-5ubuntu3.1 Ubuntu 15.04: isc-dhcp-client 4.3.1-5ubuntu2.3 isc-dhcp-relay 4.3.1-5ubuntu2.3 isc-dhcp-server 4.3.1-5ubuntu2.3 isc-dhcp-server-ldap 4.3.1-5ubuntu2.3 Ubuntu 14.04 LTS: isc-dhcp-client 4.2.4-7ubuntu12.4 isc-dhcp-relay 4.2.4-7ubuntu12.4 isc-dhcp-server 4.2.4-7ubuntu12.4 isc-dhcp-server-ldap 4.2.4-7ubuntu12.4 Ubuntu 12.04 LTS: isc-dhcp-client 4.1.ESV-R4-0ubuntu5.10 isc-dhcp-relay 4.1.ESV-R4-0ubuntu5.10 isc-dhcp-server 4.1.ESV-R4-0ubuntu5.10 isc-dhcp-server-ldap 4.1.ESV-R4-0ubuntu5.10 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-2868-1

CVE-2015-8605

Severity
January 13, 2016

Package Information

https://launchpad.net/ubuntu/+source/isc-dhcp/4.3.1-5ubuntu3.1 https://launchpad.net/ubuntu/+source/isc-dhcp/4.3.1-5ubuntu2.3 https://launchpad.net/ubuntu/+source/isc-dhcp/4.2.4-7ubuntu12.4 https://launchpad.net/ubuntu/+source/isc-dhcp/4.1.ESV-R4-0ubuntu5.10

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