A Denial of Service vulnerability was discovered in c-ares.
|Package||net-dns/c-ares on all architectures|
|Affected versions||< 1.17.1|
|Unaffected versions||>= 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"
December 23, 2020
December 23, 2020: 1