[USN-7526-1] Bind vulnerability

[Marc Deslauriers]

==========================================================================
Ubuntu Security Notice USN-7526-1
May 21, 2025

bind9 vulnerability
==========================================================================

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

- Ubuntu 25.04
- Ubuntu 24.10

Summary:

Bind could be made to crash if it received specially crafted network
traffic.

Software Description:
- bind9: Internet Domain Name Server

Details:

It was discovered that Bind incorrectly handled certain DNS messages with
invalid TSIG. A remote attacker could possibly use this issue to cause Bind
to crash, resulting in a denial of service.

Update instructions:

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

Ubuntu 25.04
   bind9                           1:9.20.4-3ubuntu1.1

Ubuntu 24.10
   bind9                           1:9.20.0-2ubuntu3.2

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

References:
   https://ubuntu.com/security/notices/USN-7526-1
   CVE-2025-40775

Package Information:
   https://launchpad.net/ubuntu/+source/bind9/1:9.20.4-3ubuntu1.1
   https://launchpad.net/ubuntu/+source/bind9/1:9.20.0-2ubuntu3.2

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