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Ubuntu Security Notice USN-2868-1

Ubuntu Security Notice USN-2868-1
Posted Jan 13, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2868-1 - 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.

tags | advisory, remote, denial of service, udp
systems | linux, ubuntu
advisories | CVE-2015-8605
SHA-256 | c5a7a3c159969f4761a1a33373c3d712d4644dd05a52df278088429555d95a96

Ubuntu Security Notice USN-2868-1

Change Mirror Download
==========================================================================
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:
http://www.ubuntu.com/usn/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


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