c-ares: Denial of service

c-ares: Denial of service A Denial of Service vulnerability was discovered in c-ares. c-ares 2020-12-23 2020-12-23 754939 local, remote 1.17.1 1.17.1

c-ares is an asynchronous resolver library.

It was discovered that c-ares incorrectly handled certain DNS requests.

A remote attacker, able to trigger a DNS request for a host of their choice by an application linked against c-ares, could possibly cause a Denial of Service condition.

There is no known workaround at this time.

All c-ares users should upgrade to the latest version:


      # emerge --sync
      # emerge --ask --oneshot --verbose ">=net-dns/c-ares-1.17.1"

CVE-2020-8277 whissi whissi