[ GLSA 202012-11 ] c-ares

[GLSA]

Gentoo Linux Security Advisory

Title: c-ares: Denial of service (GLSA 202012-11)
Severity: low
Exploitable: local, remote
Date: 2020-12-23
Bug(s): #754939
ID: 202012-11

Synopsis

A Denial of Service vulnerability was discovered in c-ares.

Background

c-ares is an asynchronous resolver library.

Affected Packages

Package: net-dns/c-ares
Vulnerable: < 1.17.1
Unaffected: >= 1.17.1
Architectures: All supported architectures


Description

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

Impact

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.


Workaround

There is no known workaround at this time.

Resolution

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