USN-4638-1: c-ares vulnerability

Publication date

19 November 2020

Overview

c-ares could be made to denial of service if it received a specially crafted DNS request.

Releases

20.10

Packages

It was discovered that c-ares incorrectly handled certain DNS requests.
An attacker could possibly use this issue to cause a denial of service.

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

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

Ubuntu Release	Package Version
20.10 groovy	libc-ares2 – 1.16.1-1ubuntu0.1

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