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USN-5332-2: Bind vulnerability

17 March 2022

Bind could be made to manipulate cache results.

Releases

Packages

  • bind9 - Internet Domain Name Server

Details

USN-5332-1 fixed a vulnerability in Bind. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

Xiang Li, Baojun Liu, Chaoyi Lu, and Changgen Zou discovered that Bind
incorrectly handled certain bogus NS records when using forwarders. A
remote attacker could possibly use this issue to manipulate cache results.
(CVE-2021-25220)

Update instructions

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

Ubuntu 16.04
Ubuntu 14.04

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

References

Related notices

  • USN-5332-1: libisc-export169, dnsutils, bind9-utils, libisccfg-export160, libdns-export1100, liblwres160, bind9, libbind-dev, libisc169, bind9-dev, libisccc160, bind9utils, bind9-host, libbind9-160, libirs-export160, bind9-dnsutils, bind9-doc, libisccc-export160, libisccfg160, libdns1100, bind9-libs, libirs160, libbind-export-dev