USN-7641-1

It was discovered that Bind incorrectly handled configurations where the stale-answer-client-timeout option is set to 0. A remote attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service.

References

Affected packages

Ubuntu:25.04 / bind9

Package

Name: bind9
Purl: pkg:deb/ubuntu/bind9@1:9.20.4-3ubuntu1.2?arch=source&distro=plucky

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1:9.20.4-3ubuntu1.2

Affected versions

1:9.*

1:9.20.0-2ubuntu3

1:9.20.0-2ubuntu4

1:9.20.4-3ubuntu1

1:9.20.4-3ubuntu1.1

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "bind9",
            "binary_version": "1:9.20.4-3ubuntu1.2"
        },
        {
            "binary_name": "bind9-dbgsym",
            "binary_version": "1:9.20.4-3ubuntu1.2"
        },
        {
            "binary_name": "bind9-dev",
            "binary_version": "1:9.20.4-3ubuntu1.2"
        },
        {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.20.4-3ubuntu1.2"
        },
        {
            "binary_name": "bind9-dnsutils-dbgsym",
            "binary_version": "1:9.20.4-3ubuntu1.2"
        },
        {
            "binary_name": "bind9-doc",
            "binary_version": "1:9.20.4-3ubuntu1.2"
        },
        {
            "binary_name": "bind9-host",
            "binary_version": "1:9.20.4-3ubuntu1.2"
        },
        {
            "binary_name": "bind9-host-dbgsym",
            "binary_version": "1:9.20.4-3ubuntu1.2"
        },
        {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.20.4-3ubuntu1.2"
        },
        {
            "binary_name": "bind9-libs-dbgsym",
            "binary_version": "1:9.20.4-3ubuntu1.2"
        },
        {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.20.4-3ubuntu1.2"
        },
        {
            "binary_name": "bind9-utils-dbgsym",
            "binary_version": "1:9.20.4-3ubuntu1.2"
        },
        {
            "binary_name": "bind9utils",
            "binary_version": "1:9.20.4-3ubuntu1.2"
        },
        {
            "binary_name": "dnsutils",
            "binary_version": "1:9.20.4-3ubuntu1.2"
        }
    ]
}