USN-4365-2: Bind vulnerabilities

20 May 2020

Several security issues were fixed in Bind.



  • bind9 - Internet Domain Name Server


USN-4365-1 fixed several vulnerabilities in Bind. This update provides
the corresponding update for Ubuntu 12.04 ESM and 14.04 ESM.

Original advisory details:

Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Bind
incorrectly limited certain fetches. A remote attacker could possibly use
this issue to cause Bind to consume resources, leading to a denial of
service, or possibly use Bind to perform a reflection attack.

Tobias Klein discovered that Bind incorrectly handled checking TSIG
validity. A remote attacker could use this issue to cause Bind to crash,
resulting in a denial of service, or possibly perform other attacks.

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-4365-1: bind9-dnsutils, bind9-doc, libisccfg-export140-udeb, libisccc160, libisccc-export161, libisc-export169, libisccc-export161-udeb, bind9-host, libirs160, libdns-export1100, libdns-export162-udeb, libirs-export160-udeb, host, libisccfg-export140, bind9-libs, libisccfg163, libisc-export160-udeb, libisc-export160, libisccfg-export163-udeb, libisccc-export140-udeb, libisc-export169-udeb, libisccfg140, libdns-export1104, libirs-export141, libdns-export162, libisccc-export160-udeb, bind9utils, libirs141, libdns-export1100-udeb, libbind9-161, lwresd, liblwres161, libisccfg-export160, libisccfg160, libisccc-export140, bind9, libisccc140, libisccfg-export163, libdns-export1104-udeb, libbind-dev, libisc169, libisc160, libirs-export161-udeb, libisc1100, libbind-export-dev, libbind9-140, libirs-export161, libdns1100, bind9-utils, libisccc161, libisccfg-export160-udeb, libdns162, libirs-export160, libisc-export1100, libisccc-export160, libisc-export1100-udeb, dnsutils, liblwres141, libbind9-160, libirs-export141-udeb, libirs161, libdns1104, liblwres160