Ubuntu Security Notice USN-2868-1
13th January, 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 version:
- Ubuntu 15.10:
-
isc-dhcp-server
4.3.1-5ubuntu3.1
-
isc-dhcp-relay
4.3.1-5ubuntu3.1
-
isc-dhcp-client
4.3.1-5ubuntu3.1
-
isc-dhcp-server-ldap
4.3.1-5ubuntu3.1
- Ubuntu 15.04:
-
isc-dhcp-server
4.3.1-5ubuntu2.3
-
isc-dhcp-relay
4.3.1-5ubuntu2.3
-
isc-dhcp-client
4.3.1-5ubuntu2.3
-
isc-dhcp-server-ldap
4.3.1-5ubuntu2.3
- Ubuntu 14.04 LTS:
-
isc-dhcp-server
4.2.4-7ubuntu12.4
-
isc-dhcp-relay
4.2.4-7ubuntu12.4
-
isc-dhcp-client
4.2.4-7ubuntu12.4
-
isc-dhcp-server-ldap
4.2.4-7ubuntu12.4
- Ubuntu 12.04 LTS:
-
isc-dhcp-server
4.1.ESV-R4-0ubuntu5.10
-
isc-dhcp-relay
4.1.ESV-R4-0ubuntu5.10
-
isc-dhcp-client
4.1.ESV-R4-0ubuntu5.10
-
isc-dhcp-server-ldap
4.1.ESV-R4-0ubuntu5.10
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
References
Source: ubuntu-usn
