An attacker can send a notify request that causes a new secondary domain to be added to the bind backend, but causes said backend to update its configuration to an invalid one, leading to the backend no longer able to run on the next restart, requiring manual operation to fix it.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the a8614190-73b4-11f1-910d-3c7c3fba4204 advisory.

    PowerDNS Team reports:
    Thanks to people below for reporting these vulnerabilities:
    Thanks to ilya rozentsvaig for reporting this vulnerability.

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6233 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6233-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     April 28, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : pdns     CVE ID         : CVE-2026-33257 CVE-2026-33260 CVE-2026-33608                      CVE-2026-33609 CVE-2026-33610 CVE-2026-33611

    Multiple security vulnerabilities were discovered in the dnsdist DNS     loadbalancer, which could result in denial of service, information     disclosure or ACL bypass.

    For the stable distribution (trixie), these problems have been fixed in     version 4.9.14-0+deb13u1.

    We recommend that you upgrade your pdns packages.

    For the detailed security status of pdns please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/pdns

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - An attacker can send a notify request that causes a new secondary domain to be added to the bind backend,
    but causes said backend to update its configuration to an invalid one, leading to the backend no longer
    able to run on the next restart, requiring manual operation to fix it. (CVE-2026-33608)

  - An attacker can send a web request that causes unlimited memory allocation in the internal web server,
    leading to a denial of service. The internal web server is disabled by default. (CVE-2026-33257,
    CVE-2026-33260)

  - Incomplete escaping of LDAP queries when running with 8bit-dns enabled allows users to perform queries of
    internal domain subtrees. (CVE-2026-33609)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - An attacker can send a notify request that causes a new secondary domain to be added to the bind backend,     but causes said backend to update its configuration to an invalid one, leading to the backend no longer     able to run on the next restart, requiring manual operation to fix it. (CVE-2026-33608)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
323689	FreeBSD : PowerDNS -- vulnerabilities (a8614190-73b4-11f1-910d-3c7c3fba4204)	Nessus	FreeBSD Local Security Checks	critical
310796	Debian dsa-6233 : pdns-backend-bind - security update	Nessus	Debian Local Security Checks	critical
440773	Alpine: multiple pdns packages: security update to 5.0.4-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	critical
440773	Alpine: multiple pdns packages: security update to 5.0.4-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	critical
309878	Linux Distros Unpatched Vulnerability : CVE-2026-33608	Nessus	Misc.	critical

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CVE-2026-33608

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