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USN-5126-2: Bind vulnerability

28 October 2021

Bind could be made to consume resources if it received specially crafted network traffic.



  • bind9 - Internet Domain Name Server


USN-5126-1 fixed a vulnerability in Bind. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

Kishore Kumar Kothapalli discovered that Bind incorrectly handled the lame
cache when processing responses. A remote attacker could possibly use this
issue to cause Bind to consume resources, resulting in a denial of service.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.04
Ubuntu 14.04

In general, a standard system update will make all the necessary changes.


Related notices

  • USN-5126-1: bind9-doc, bind9-utils, libirs160, bind9-host, libbind-export-dev, libisc-export169, libisccc-export160, libisc169, libirs-export160, libbind9-160, libisccfg160, bind9utils, libdns1100, libisccc160, libisccfg-export160, liblwres160, libdns-export1100, bind9-dnsutils, dnsutils, bind9-dev, libbind-dev, bind9, bind9-libs