CVE-2016-6173

NSD before 4.1.11 allows remote DNS master servers to cause a denial of service (/tmp disk...

7.5 HighFix available

NSD before 4.1.11 allows remote DNS master servers to cause a denial of service (/tmp disk consumption and slave server crash) via a zone transfer with unlimited data.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

2.92%Up 1.7 points since Feb 4, 2022

What each source reports

NVD Score used 7.5

NSD before 4.1.11 allows remote DNS master servers to cause a denial of service (/tmp disk consumption and slave server crash) via a zone transfer with unlimited data.

Record: CVE-2016-6173
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 7.8 HighAV:N/AC:L/Au:N/C:N/I:N/A:C
Weakness: CWE-399
Updated: 2026-11-02

CVE List No score

NSD before 4.1.11 allows remote DNS master servers to cause a denial of service (/tmp disk consumption and slave server crash) via a zone transfer with unlimited data.

Record: CVE-2016-6173
Updated: 2026-11-02

EUVDEUVD-2016-7107 No score

NSD before 4.1.11 allows remote DNS master servers to cause a denial of service (/tmp disk consumption and slave server crash) via a zone transfer with unlimited data.

Record: EUVD-2016-7107
Updated: 2026-11-03

GitHub AdvisoriesGHSA-h7fr-j2jh-7mww 7.5

NSD before 4.1.11 allows remote DNS master servers to cause a denial of service (/tmp disk...

NSD before 4.1.11 allows remote DNS master servers to cause a denial of service (/tmp disk consumption and slave server crash) via a zone transfer with unlimited data.

Record: GHSA-h7fr-j2jh-7mww
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSV 7.5

NSD before 4.1.11 allows remote DNS master servers to cause a denial of service (/tmp disk consumption and slave server crash) via a zone transfer with unlimited data.

Record: CVE-2016-6173
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2016-6173 7.5

NSD before 4.1.11 allows remote DNS master servers to cause a denial of service (/tmp disk consumption and slave server crash) via a zone transfer with unlimited data.

Record: DEBIAN-CVE-2016-6173
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2016-6173 7.5

NSD before 4.1.11 allows remote DNS master servers to cause a denial of service (/tmp disk consumption and slave server crash) via a zone transfer with unlimited data.

Record: UBUNTU-CVE-2016-6173
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVopenSUSE-SU-2024:11100-1 No score

nsd-4.3.7-1.2 on GA media

These are all security issues fixed in the nsd-4.3.7-1.2 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2024:11100-1
Updated: 2026-11-02

Affected products

nlnetlabs nsd

Affected packages

Affected packages
Package	Affected	Fixed
`nsd` Debian:12	before 4.1.11-1	4.1.11-1
`nsd` Debian:13	before 4.1.11-1	4.1.11-1
`nsd` Debian:14	before 4.1.11-1	4.1.11-1
`nsd` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 4.1.2-14.1.6-14.1.7-14.1.7-1ubuntu0.1~esm1	None known
`nsd` openSUSE:Tumbleweed	before 4.3.7-1.2	4.3.7-1.2

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2016-6173 is a high vulnerability (CVSS 7.5) in Nlnetlabs Nsd, published February 9, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.92%, the 87th percentile. Fixed in nsd 4.1.11-1.

References

Show 11 moreShow less