[USN-6909-2] Bind vulnerabilities

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Ubuntu Security Notice USN-6909-2
August 01, 2024

bind9 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in Bind.

Software Description:
- bind9: Internet Domain Name Server

Details:

USN-6909-1 fixed several vulnerabilities in Bind. This update provides
the corresponding update for Ubuntu 18.04 LTS.

Original advisory details:

Toshifumi Sakaguchi discovered that Bind incorrectly handled having a very
large number of RRs existing at the same time. A remote attacker could
possibly use this issue to cause Bind to consume resources, leading to a
denial of service. (CVE-2024-1737)

It was discovered that Bind incorrectly handled a large number of SIG(0)
signed requests. A remote attacker could possibly use this issue to cause
Bind to consume resources, leading to a denial of service. (CVE-2024-1975)

Update instructions:

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

Ubuntu 18.04 LTS
bind9 1:9.11.3+dfsg-1ubuntu1.19+esm4
Available with Ubuntu Pro

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

References:
https://ubuntu.com/security/notices/USN-6909-2
https://ubuntu.com/security/notices/USN-6909-1
CVE-2024-1737, CVE-2024-1975