Low: dnsmasq

Issue Overview:

A flaw was found in the Dnsmasq application where a remote attacker can trigger a memory leak by sending specially crafted DHCP responses to the server. A successful attack is dependent on a specific configuration regarding the domain name set into the dnsmasq.conf file. Over time, the memory leak may cause the process to run out of memory and terminate, causing a denial of service. (CVE-2019-14834)

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-2.76-16.amzn2.0.1.aarch64  
    dnsmasq-utils-2.76-16.amzn2.0.1.aarch64  
    dnsmasq-debuginfo-2.76-16.amzn2.0.1.aarch64  
  
i686:  
    dnsmasq-2.76-16.amzn2.0.1.i686  
    dnsmasq-utils-2.76-16.amzn2.0.1.i686  
    dnsmasq-debuginfo-2.76-16.amzn2.0.1.i686  
  
src:  
    dnsmasq-2.76-16.amzn2.0.1.src  
  
x86_64:  
    dnsmasq-2.76-16.amzn2.0.1.x86_64  
    dnsmasq-utils-2.76-16.amzn2.0.1.x86_64  
    dnsmasq-debuginfo-2.76-16.amzn2.0.1.x86_64  

Additional References

Red Hat: CVE-2019-14834

Mitre: CVE-2019-14834