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Ubuntu Security Notice USN-2868-1
January 13, 2016
isc-dhcp vulnerability
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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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