CVE-2023-2829

Name: CVE-2023-2829
Creator: NVD / NIST
Published: 2023-06-21T17:15:47.77+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.92%

Last modified Jun 17, 2026

CVE-2023-2829 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a malformed NSEC record. This issue affects BIND 9 versions 9.16.8-S1 through 9.16.41-S1 and 9.18.11-S1 through 9.18.15-S1.. EPSS estimates a 0.92% chance of exploitation in the next 30 days.

Description

A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a malformed NSEC record. This issue affects BIND 9 versions 9.16.8-S1 through 9.16.41-S1 and 9.18.11-S1 through 9.18.15-S1.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.92%

55.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Isc	Bind	>= 9.16.8, <= 9.16.41
Isc	Bind	>= 9.18.11, <= 9.18.15
Netapp	Active Iq Unified Manager	All versions
Netapp	H500s Firmware	All versions
Netapp	H700s Firmware	All versions
Netapp	H410s Firmware	All versions
Netapp	H410c Firmware	All versions
Netapp	H300s Firmware	All versions

References

https://kb.isc.org/docs/cve-2023-2829Vendor Advisory
https://security.netapp.com/advisory/ntap-20230703-0010/Third Party Advisory
https://kb.isc.org/docs/cve-2023-2829Vendor Advisory
https://security.netapp.com/advisory/ntap-20230703-0010/Third Party Advisory

Timeline

Published: Jun 21, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-2829?

How severe is CVE-2023-2829?

CVE-2023-2829 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.92% probability of exploitation in the next 30 days.

How do I fix CVE-2023-2829?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-2829?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST