CVE-2023-4408

Name: CVE-2023-4408
Creator: NVD / NIST
Published: 2024-02-13T14:15:45.253+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.33%

Last modified Jun 17, 2026

CVE-2023-4408 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The DNS message parsing code in `named` includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive CPU load on the affected `named` instance by exploiting this flaw. EPSS estimates a 1.33% chance of exploitation in the next 30 days.

Description

The DNS message parsing code in `named` includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive CPU load on the affected `named` instance by exploiting this flaw. This issue affects both authoritative servers and recursive resolvers. This issue affects BIND 9 versions 9.0.0 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-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

1.33%

67.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-407

Affected Software

Vendor	Product	Versions	Update
Netapp	Ontap	9.14.1	—
Netapp	Ontap	9.15.1	—
Fedoraproject	Fedora	38	—
Fedoraproject	Fedora	39	—
Isc	Bind	>= 9.0.0, <= 9.16.45	—
Isc	Bind	>= 9.18.0, <= 9.18.21	—
Isc	Bind	>= 9.19.0, <= 9.19.19	—
Isc	Bind	9.9.3	S1
Isc	Bind	9.16.8	S1
Isc	Bind	9.16.11	S1
Isc	Bind	9.16.12	S1
Isc	Bind	9.16.13	S1
Isc	Bind	9.16.14	S1
Isc	Bind	9.16.21	S1
Isc	Bind	9.16.32	S1
Isc	Bind	9.16.36	S1
Isc	Bind	9.16.43	S1
Isc	Bind	9.18.0	S1
Isc	Bind	9.18.11	S1
Isc	Bind	9.18.18	S1

References

http://www.openwall.com/lists/oss-security/2024/02/13/1Mailing List, Third Party Advisory
https://kb.isc.org/docs/cve-2023-4408Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/Mailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20240426-0001/Third Party Advisory
http://www.openwall.com/lists/oss-security/2024/02/13/1Mailing List, Third Party Advisory
https://kb.isc.org/docs/cve-2023-4408Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/Mailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20240426-0001/Third Party Advisory

Timeline

Published: Feb 13, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-4408?

How severe is CVE-2023-4408?

CVE-2023-4408 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.33% probability of exploitation in the next 30 days.

How do I fix CVE-2023-4408?

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-2023-4408?

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

Scan your code now

Source: NVD / NIST