A Bind security update has been released for Ubuntu 18.04 LTS, 20.04 LTS, and 21.10.
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Ubuntu Security Notice USN-5332-1
March 17, 2022
bind9 vulnerabilities
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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
