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Ubuntu Security Notice USN-5332-1

Ubuntu Security Notice USN-5332-1
Posted Mar 17, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5332-1 - 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. It was discovered that Bind incorrectly handled certain crafted TCP streams. A remote attacker could possibly use this issue to cause Bind to consume resources, leading to a denial of service. This issue only affected Ubuntu 21.10.

tags | advisory, remote, denial of service, tcp
systems | linux, ubuntu
advisories | CVE-2021-25220, CVE-2022-0396
SHA-256 | a4994aaa2841edfa08cf6a3ec7db1b8502e811fd0d2b3e850e50b578b1dbc1ca

Ubuntu Security Notice USN-5332-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-5332-1
March 17, 2022

bind9 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in Bind.

Software Description:
- bind9: Internet Domain Name Server

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)

It was discovered that Bind incorrectly handled certain crafted TCP
streams. A remote attacker could possibly use this issue to cause Bind to
consume resources, leading to a denial of service. This issue only affected
Ubuntu 21.10. (CVE-2022-0396)

Update instructions:

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

Ubuntu 21.10:
bind9 1:9.16.15-1ubuntu1.2

Ubuntu 20.04 LTS:
bind9 1:9.16.1-0ubuntu2.10

Ubuntu 18.04 LTS:
bind9 1:9.11.3+dfsg-1ubuntu1.17

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

References:
https://ubuntu.com/security/notices/USN-5332-1
CVE-2021-25220, CVE-2022-0396

Package Information:
https://launchpad.net/ubuntu/+source/bind9/1:9.16.15-1ubuntu1.2
https://launchpad.net/ubuntu/+source/bind9/1:9.16.1-0ubuntu2.10
https://launchpad.net/ubuntu/+source/bind9/1:9.11.3+dfsg-1ubuntu1.17
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