1. Ubuntu Security Notices
  2. USN-3973-1

USN-3973-1: DHCP vulnerability

Publication date

13 May 2019

Overview

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

Releases

Packages

Details

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.

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
18.10 cosmic isc-dhcp-server –  4.3.5-3ubuntu9.1
18.04 bionic isc-dhcp-server –  4.3.5-3ubuntu7.1

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References

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