nsd

NSD The NLnet Labs Name Server Daemon NSD is an authoritative DNS name server. It has been developed for operations in environments where speed, reliability, stability and security are of high importance. If you have any feedback, we would love to hear from you. Don’t hesitate to create an issue ...

[SECURITY] Fedora 44 Update: nsd-4.15.1-1.fc44

NSD is a complete implementation of an authoritative DNS name server. For further information about what NSD is and what NSD is not please consult the REQUIREMENTS document which is a part of this distribution...

[SECURITY] Fedora 43 Update: nsd-4.15.1-1.fc43

NSD is a complete implementation of an authoritative DNS name server. For further information about what NSD is and what NSD is not please consult the REQUIREMENTS document which is a part of this distribution...

Fedora 43 : nsd (2026-3ff003d397)

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-3ff003d397 advisory. BUG FIXES: Fix for CVE-2026-18664: IP range access control restrictions are bypassed for some unintended IP. Thanks to Qifan Zhang, Palo Alto Networ...

Fedora 44 : nsd (2026-bf1539678e)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-bf1539678e advisory. BUG FIXES: Fix for CVE-2026-18664: IP range access control restrictions are bypassed for some unintended IP. Thanks to Qifan Zhang, Palo Alto Networ...

EUVD-2026-66347

When ranges are used for access control i.e. of the form 1.2.3.4-1.2.3.25, because NSD wrongly compares the IP address with the range on little endian systems, IPs that were meant to be allowed may be denied, and, IPs that were meant to be denied access could be allowed. An IPv4 address is compar...

EUVD-2026-66349

Any remote client can crash a debugging/non-release build type NSD serve child by sending it a special crafted message with a specially tuned number of DNS Cookie options 17 when UDP payload size is 512. By continuously crashing the serve childs, the remote client can severely hamper or, when...

EUVD-2026-66348

Any remote client can crash a NSD serve child, by throttling the TCP receive window after a TCP query. By continuously crashing the serve childs, the remote client can denial all TCP service to this NSD instance...

FreeBSD : NSD -- multiple vulnerabilities (a711b018-a24b-11f1-81e6-3c7c3fba4204)

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 a711b018-a24b-11f1-81e6-3c7c3fba4204 advisory. NLnet Labs reports: Tenable has extracted the preceding description block directly from the...

Linux Distros Unpatched Vulnerability : CVE-2026-18916

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Any remote client can crash a NSD serve child, by throttling the TCP receive window after a TCP query. By continuously crashing the serve childs, the remote...

Linux Distros Unpatched Vulnerability : CVE-2026-19401

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Any remote client can crash a debugging/non-release build type NSD serve child by sending it a special crafted message with a specially tuned number of DNS Cook...

Linux Distros Unpatched Vulnerability : CVE-2026-18664

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - When ranges are used for access control i.e. of the form 1.2.3.4-1.2.3.25, because NSD wrongly compares the IP address with the range on little endian systems,...

CVE-2026-19401

A flaw was found in NSD. A remote attacker can crash an NSD server child by sending a specially crafted message containing a specific number of DNS Cookie options. This continuous crashing can severely hamper or deny DNS service, leading to a denial of service DoS condition. This vulnerability...

CVE-2026-18916

A flaw was found in NSD. A remote attacker can exploit this vulnerability by continuously throttling the TCP receive window after a TCP query, causing an NSD serve child to crash. This repeated crashing can lead to a complete denial of TCP service for the affected NSD instance. Mitigation To...

CVE-2026-19538

A flaw was found in nsd. A remote attacker can bypass BLOCKED access control list ACL items on the proxy protocol port. This bypass occurs when connecting over TCP or TLS and sending the query twice on a persistent connection. This could allow unauthorized access or actions that should have been...

CVE-2026-18664

A flaw was found in NSD. On systems using little-endian architecture, the software incorrectly compares IP addresses against defined Access Control List ACL ranges. This misinterpretation can lead to a bypass of intended access controls, where IP addresses that should be denied access are instead...

CVE-2026-19401

Any remote client can crash a debugging/non-release build type NSD serve child by sending it a special crafted message with a specially tuned number of DNS Cookie options 17 when UDP payload size is 512. By continuously crashing the serve childs, the remote client can severely hamper or, when...

DEBIAN-CVE-2026-19401

Any remote client can crash a debugging/non-release build type NSD serve child by sending it a special crafted message with a specially tuned number of DNS Cookie options 17 when UDP payload size is 512. By continuously crashing the serve childs, the remote client can severely hamper or, when...

CVE-2026-18664

When ranges are used for access control i.e. of the form 1.2.3.4-1.2.3.25, because NSD wrongly compares the IP address with the range on little endian systems, IPs that were meant to be allowed may be denied, and, IPs that were meant to be denied access could be allowed. An IPv4 address is compar...

DEBIAN-CVE-2026-18916

Any remote client can crash a NSD serve child, by throttling the TCP receive window after a TCP query. By continuously crashing the serve childs, the remote client can denial all TCP service to this NSD instance...