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
-
bind9
-
1:9.10.3.dfsg.P4-8ubuntu1.19+esm2
Available with Ubuntu Pro
Ubuntu 14.04
-
bind9
-
1:9.9.5.dfsg-3ubuntu0.19+esm6
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References
Related notices
- USN-5332-1: dnsutils, libbind-export-dev, bind9, liblwres160, libisccfg160, bind9-dnsutils, libbind9-160, libisccc-export160, bind9utils, libisc169, libisc-export169, libirs160, bind9-dev, libdns1100, libbind-dev, bind9-libs, libisccfg-export160, libisccc160, bind9-utils, bind9-host, bind9-doc, libirs-export160, libdns-export1100