[USN-3973-1] DHCP vulnerability

Marc Deslauriers marc.deslauriers at canonical.com
Mon May 13 15:16:41 UTC 2019

Ubuntu Security Notice USN-3973-1
May 13, 2019

isc-dhcp vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.10
- Ubuntu 18.04 LTS


DHCP could be made to crash if it received specially crafted network

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


It was discovered that DHCP, when built with a mismatched external BIND
library, incorrectly handled certain memory operations. A remote attacker
could possibly use this issue to cause DHCP to crash, resulting in a
denial of service.

Update instructions:

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

Ubuntu 18.10:
  isc-dhcp-server                 4.3.5-3ubuntu9.1

Ubuntu 18.04 LTS:
  isc-dhcp-server                 4.3.5-3ubuntu7.1

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


Package Information:

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