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USN-5626-2: Bind vulnerabilities

21 September 2022

Several security issues were fixed in Bind.

Releases

Packages

  • bind9 - Internet Domain Name Server

Details

USN-5626-1 fixed several vulnerabilities in Bind. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

Yehuda Afek, Anat Bremler-Barr, and Shani Stajnrod discovered that Bind
incorrectly handled large delegations. A remote attacker could possibly use
this issue to reduce performance, leading to a denial of service.
(CVE-2022-2795)

It was discovered that Bind incorrectly handled memory when processing
ECDSA DNSSEC verification. A remote attacker could use this issue to
consume resources, leading to a denial of service. (CVE-2022-38177)

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.

Related notices

  • USN-5626-1: bind9-dev, libdns1100, bind9-libs, bind9-dnsutils, libirs160, libbind-export-dev, liblwres160, libisccfg160, libdns-export1100, libisccc160, libisccfg-export160, libisccc-export160, bind9-utils, bind9-host, libirs-export160, dnsutils, bind9, libbind-dev, libisc-export169, bind9-doc, bind9utils, libbind9-160, libisc169