USN-3956-1: Bind vulnerability

25 April 2019

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



  • bind9 - Internet Domain Name Server


It was discovered that Bind incorrectly handled limiting the number of
simultaneous TCP clients. A remote attacker could possibly use this issue
to cause Bind to consume resources, leading to a denial of service.

Update instructions

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

Ubuntu 19.04
Ubuntu 18.10
Ubuntu 18.04
Ubuntu 16.04

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


Related notices

  • USN-3956-2: liblwres80, bind9-host, libisccc80, libisccfg90, bind9utils, lwresd, libisc83, dnsutils, host, bind9-doc, liblwres90, libisccc90, bind9, libbind-dev, libbind9-90, libbind9-80, libisc95, libisccfg82, libdns100, libdns81