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