[USN-5126-1] Bind vulnerability
Marc Deslauriers
marc.deslauriers at canonical.com
Thu Oct 28 16:36:37 UTC 2021
==========================================================================
Ubuntu Security Notice USN-5126-1
October 28, 2021
bind9 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.10
- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
Summary:
Bind could be made to consume resources if it received specially crafted
network traffic.
Software Description:
- bind9: Internet Domain Name Server
Details:
Kishore Kumar Kothapalli discovered that Bind incorrectly handled the lame
cache when processing responses. A remote attacker could possibly use this
issue to cause Bind to consume resources, resulting in a denial of service.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 21.10:
bind9 1:9.16.15-1ubuntu1.1
Ubuntu 21.04:
bind9 1:9.16.8-1ubuntu3.2
Ubuntu 20.04 LTS:
bind9 1:9.16.1-0ubuntu2.9
Ubuntu 18.04 LTS:
bind9 1:9.11.3+dfsg-1ubuntu1.16
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5126-1
CVE-2021-25219
Package Information:
https://launchpad.net/ubuntu/+source/bind9/1:9.16.15-1ubuntu1.1
https://launchpad.net/ubuntu/+source/bind9/1:9.16.8-1ubuntu3.2
https://launchpad.net/ubuntu/+source/bind9/1:9.16.1-0ubuntu2.9
https://launchpad.net/ubuntu/+source/bind9/1:9.11.3+dfsg-1ubuntu1.16
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