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USN-5626-1: Bind vulnerabilities

21 September 2022

Several security issues were fixed in Bind.

Releases

Packages

  • bind9 - Internet Domain Name Server

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 statistics requests. A
remote attacker could possibly use this issue to obtain sensitive memory
contents, or cause a denial of service. This issue only affected Ubuntu
22.04 LTS. (CVE-2022-2881)

It was discovered that Bind incorrectly handled memory when processing
certain Diffie-Hellman key exchanges. A remote attacker could use this
issue to consume resources, leading to a denial of service. This issue only
affected Ubuntu 22.04 LTS. (CVE-2022-2906)

Maksym Odinintsev discovered that Bind incorrectly handled answers from
cache when configured with a zero stale-answer-timeout. A remote attacker
could possibly use this issue to cause Bind to crash, resulting in a denial
of service. This issue only affected Ubuntu 22.04 LTS. (CVE-2022-3080)

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. This issue only affected
Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2022-38177)

It was discovered that Bind incorrectly handled memory when processing
EDDSA DNSSEC verification. A remote attacker could use this issue to
consume resources, leading to a denial of service. (CVE-2022-38178)

Update instructions

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

Ubuntu 22.04
Ubuntu 20.04
Ubuntu 18.04

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

Related notices

  • USN-5626-2: libdns100, libisccc-export140-udeb, host, libisccfg-export140, liblwres90, libisc160, liblwres141, libisccc-export140, libbind-export-dev, libdns-export162, lwresd, libisccc90, libisc95, libisccfg90, bind9-host, libbind9-140, dnsutils, bind9, libbind-dev, libirs-export141, libisccc140, libirs141, libbind9-90, bind9-doc, bind9utils, libdns162, libisc-export160, libisccfg140