USN-3956-2: Bind vulnerability

09 May 2019

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



  • bind9 - Internet Domain Name Server


USN-3956-1 fixed a vulnerability in Bind. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

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 14.04
Ubuntu 12.04

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


Related notices

  • USN-3956-1: libisc160, libirs160, libbind-dev, libisccc-export160-udeb, libirs-export161, libdns-export162-udeb, libisccc161, libisc-export160-udeb, libisccfg163, liblwres160, libisccfg-export140-udeb, liblwres141, libirs161, libdns-export1104, host, libisccc160, libirs-export160, libisccc-export160, libirs-export141, libisccfg160, libbind9-160, libdns-export1102-udeb, libdns1100, libbind9-161, libdns-export1102, lwresd, libisccfg-export140, libdns162, libdns-export1100, libisccc-export161, libisccfg-export163-udeb, libirs-export160-udeb, libbind-export-dev, libdns-export162, libisc-export169-udeb, libdns-export1100-udeb, dnsutils, libisc-export169, libisccc-export140, libisccc-export140-udeb, bind9-doc, libisc-export1100, libisccc-export161-udeb, libisccfg-export163, libisc1100, bind9-host, libbind9-140, libisccfg-export160, libirs-export141-udeb, liblwres161, libirs141, libdns1102, libirs-export161-udeb, libisc-export160, libisccc140, libisccfg-export160-udeb, libisc-export1100-udeb, libisc169, libdns1104, libisccfg140, bind9utils, libdns-export1104-udeb, bind9