Medium: dnsmasq

Issue Overview:

A flaw was found in the default configuration of dnsmasq, as shipped with Fedora and Red Hat Enterprise Linux, where it listens on any interface and accepts queries from addresses outside of its local subnet. In particular, the option local-service is not enabled. Running dnsmasq in this manner may inadvertently make it an open resolver accessible from any address on the internet. This flaw allows an attacker to conduct a Distributed Denial of Service (DDoS) against other systems. (CVE-2020-14312)

Affected Packages:

dnsmasq

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update dnsmasq to update your system.

New Packages:

aarch64:  
    dnsmasq-2.76-10.amzn2.1.1.aarch64  
    dnsmasq-utils-2.76-10.amzn2.1.1.aarch64  
    dnsmasq-debuginfo-2.76-10.amzn2.1.1.aarch64  
  
i686:  
    dnsmasq-2.76-10.amzn2.1.1.i686  
    dnsmasq-utils-2.76-10.amzn2.1.1.i686  
    dnsmasq-debuginfo-2.76-10.amzn2.1.1.i686  
  
src:  
    dnsmasq-2.76-10.amzn2.1.1.src  
  
x86_64:  
    dnsmasq-2.76-10.amzn2.1.1.x86_64  
    dnsmasq-utils-2.76-10.amzn2.1.1.x86_64  
    dnsmasq-debuginfo-2.76-10.amzn2.1.1.x86_64  

Additional References

Red Hat: CVE-2020-14312

Mitre: CVE-2020-14312