USN-4468-2: Bind vulnerability

24 August 2020

Bind could be made to crash if it received a specially crafted request.



  • bind9 - Internet Domain Name Server


USN-4468-1 fixed a vulnerability in Bind. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

Dave Feldman, Jeff Warren, and Joel Cunningham discovered that Bind
incorrectly handled certain truncated responses to a TSIG-signed request. A
remote attacker could possibly use this issue to cause Bind to crash,
resulting in a denial of service. (CVE-2020-8622)

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-4468-1: libdns-export162, libisc169, bind9-host, libisccc-export160-udeb, bind9-dnsutils, host, libirs-export141, libirs-export141-udeb, libisc-export169, libisccc-export160, libisccc140, libisccfg-export140-udeb, lwresd, libbind9-160, libdns-export162-udeb, libdns162, libisccc-export140-udeb, libdns-export1100-udeb, libirs-export160, dnsutils, libirs-export160-udeb, libisccfg160, libdns1100, libisccfg-export160, bind9utils, bind9-utils, libisc-export169-udeb, liblwres160, libisc160, bind9-doc, libbind-export-dev, libisc-export160-udeb, libisccc160, libbind-dev, libisccc-export140, libisccfg140, libirs160, bind9, libisc-export160, libbind9-140, liblwres141, libisccfg-export160-udeb, libirs141, libisccfg-export140, bind9-libs, libdns-export1100