CVE-2023-4408

HIGH

7.5

CVSS v3

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.

CWE-407

How to fix

Remediation Available

bind9Debian

Fixed in:1:9.16.48-1CVE-2023-4408

Fixed in:1:9.18.24-1CVE-2023-4408

Fixed in:1:9.19.21-1CVE-2023-4408

bindRocky

Fixed in:32:9.8.2-0.68.rc1.el6_10.14RHSA-2025:0039

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.ppc64RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

bindRed Hat / RHEL

Fixed in:32:9.8.2-0.68.rc1.el6_10.14RHSA-2025:0039

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.ppc64RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

bind-chrootRed Hat / RHEL

Fixed in:32:9.8.2-0.68.rc1.el6_10.14RHSA-2025:0039

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.ppc64RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.36-11.el8_9.1RHSA-2024:1782

bind-chrootRocky

Fixed in:32:9.8.2-0.68.rc1.el6_10.14RHSA-2025:0039

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.ppc64RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.36-14.el8_10RHSA-2024:3271

bind-debuginfoRed Hat / RHEL

Fixed in:32:9.8.2-0.68.rc1.el6_10.14RHSA-2025:0039

Fixed in:32:9.8.2-0.68.rc1.el6_10.14.s390RHSA-2025:0039

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.ppc64RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.s390RHSA-2024:3741

bind-debuginfoRocky

Fixed in:32:9.8.2-0.68.rc1.el6_10.14RHSA-2025:0039

Fixed in:32:9.8.2-0.68.rc1.el6_10.14.s390RHSA-2025:0039

Fixed in:32:9.8.2-0.68.rc1.el6_10.14RHSA-2025:0039

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.ppc64RHSA-2024:3741

bind-debugsourceRed Hat / RHEL

Fixed in:32:9.11.36-11.el8_9.1RHSA-2024:1782

Fixed in:32:9.11.36-14.el8_10RHSA-2024:3271

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.36-11.el8_9.1RHSA-2024:1782

Fixed in:32:9.11.36-14.el8_10RHSA-2024:3271

Fixed in:32:9.11.26-4.el8_4.4RHSA-2024:2821

Fixed in:32:9.11.36-8.el8_8.4RHSA-2024:2721

bind-debugsourceRocky

Fixed in:32:9.11.26-4.el8_4.4RHSA-2024:2821

Fixed in:32:9.11.13-6.el8_2.7RHSA-2024:2890

Fixed in:32:9.11.36-8.el8_8.4RHSA-2024:2721

Fixed in:32:9.11.36-11.el8_9.1RHSA-2024:1782

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.26-4.el8_4.4RHSA-2024:2821

Fixed in:32:9.11.36-14.el8_10RHSA-2024:3271

bind-develRocky

Fixed in:32:9.8.2-0.68.rc1.el6_10.14RHSA-2025:0039

Fixed in:32:9.8.2-0.68.rc1.el6_10.14.s390RHSA-2025:0039

Fixed in:32:9.8.2-0.68.rc1.el6_10.14RHSA-2025:0039

Fixed in:32:9.11.4-26.P2.el7_9.16.ppcRHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.ppc64RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.s390RHSA-2024:3741

bind-develRed Hat / RHEL

Fixed in:32:9.8.2-0.68.rc1.el6_10.14RHSA-2025:0039

Fixed in:32:9.8.2-0.68.rc1.el6_10.14.s390RHSA-2025:0039

Fixed in:32:9.11.4-26.P2.el7_9.16.ppc64RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.s390RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

bind-dnssec-docRed Hat / RHEL

Fixed in:32:9.16.23-11.el9_2.4RHSA-2024:1803

Fixed in:32:9.16.23-18.el9_4.1RHSA-2024:2551

Fixed in:32:9.16.23-14.el9_3.4RHSA-2024:1789

Fixed in:32:9.16.23-1.el9_0.5RHSA-2024:1800

bind-dnssec-docRocky

Fixed in:32:9.16.23-18.el9_4.1RHSA-2024:2551

Fixed in:32:9.16.23-14.el9_3.4RHSA-2024:1789

Fixed in:32:9.16.23-11.el9_2.4RHSA-2024:1803

Fixed in:32:9.16.23-1.el9_0.5RHSA-2024:1800

bind-dnssec-utilsRed Hat / RHEL

Fixed in:32:9.16.23-1.el9_0.5RHSA-2024:1800

Fixed in:32:9.16.23-18.el9_4.1RHSA-2024:2551

Fixed in:32:9.16.23-11.el9_2.4RHSA-2024:1803

Fixed in:32:9.16.23-14.el9_3.4RHSA-2024:1789

Fixed in:32:9.16.23-18.el9_4.1RHSA-2024:2551

bind-dnssec-utilsRocky

Fixed in:32:9.16.23-18.el9_4.1RHSA-2024:2551

Fixed in:32:9.16.23-11.el9_2.4RHSA-2024:1803

Fixed in:32:9.16.23-1.el9_0.5RHSA-2024:1800

Fixed in:32:9.16.23-11.el9_2.4RHSA-2024:1803

Fixed in:32:9.16.23-14.el9_3.4RHSA-2024:1789

Fixed in:32:9.16.23-11.el9_2.4RHSA-2024:1803

Fixed in:32:9.16.23-14.el9_3.4RHSA-2024:1789

bind-dnssec-utils-debuginfoRed Hat / RHEL

Fixed in:32:9.16.23-1.el9_0.5RHSA-2024:1800

Fixed in:32:9.16.23-18.el9_4.1RHSA-2024:2551

Fixed in:32:9.16.23-14.el9_3.4RHSA-2024:1789

Fixed in:32:9.16.23-18.el9_4.1RHSA-2024:2551

Fixed in:32:9.16.23-1.el9_0.5RHSA-2024:1800

Fixed in:32:9.16.23-18.el9_4.1RHSA-2024:2551

Fixed in:32:9.16.23-1.el9_0.5RHSA-2024:1800

Fixed in:32:9.16.23-11.el9_2.4RHSA-2024:1803

bind-dnssec-utils-debuginfoRocky

Fixed in:32:9.16.23-1.el9_0.5RHSA-2024:1800

Fixed in:32:9.16.23-18.el9_4.1RHSA-2024:2551

Fixed in:32:9.16.23-11.el9_2.4RHSA-2024:1803

Fixed in:32:9.16.23-18.el9_4.1RHSA-2024:2551

Fixed in:32:9.16.23-11.el9_2.4RHSA-2024:1803

Fixed in:32:9.16.23-18.el9_4.1RHSA-2024:2551

bind-docRocky

Fixed in:32:9.16.23-18.el9_4.1RHSA-2024:2551

Fixed in:32:9.16.23-14.el9_3.4RHSA-2024:1789

Fixed in:32:9.16.23-11.el9_2.4RHSA-2024:1803

bind-docRed Hat / RHEL

Fixed in:32:9.16.23-18.el9_4.1RHSA-2024:2551

Fixed in:32:9.16.23-14.el9_3.4RHSA-2024:1789

Fixed in:32:9.16.23-11.el9_2.4RHSA-2024:1803

bind-dyndb-ldapRocky

Fixed in:0:2.3-8.el6_10.1RHSA-2025:0039

Fixed in:0:11.1-7.el7_9.1RHSA-2024:3741

bind-dyndb-ldapRed Hat / RHEL

Fixed in:0:2.3-8.el6_10.1RHSA-2025:0039

Fixed in:0:11.1-7.el7_9.1.ppc64RHSA-2024:3741

Fixed in:0:11.1-7.el7_9.1RHSA-2024:3741

bind-dyndb-ldap-debuginfoRocky

Fixed in:0:2.3-8.el6_10.1RHSA-2025:0039

Fixed in:0:11.1-7.el7_9.1RHSA-2024:3741

Fixed in:0:11.1-7.el7_9.1.ppc64RHSA-2024:3741

Fixed in:0:11.1-7.el7_9.1RHSA-2024:3741

Fixed in:0:11.9-8.el9_3.3RHSA-2024:1789

bind-dyndb-ldap-debuginfoRed Hat / RHEL

Fixed in:0:2.3-8.el6_10.1RHSA-2025:0039

Fixed in:0:11.1-7.el7_9.1.ppc64RHSA-2024:3741

Fixed in:0:11.1-7.el7_9.1RHSA-2024:3741

Fixed in:0:11.9-7.el9_0.1RHSA-2024:1800

bind-dyndb-ldap-debugsourceRed Hat / RHEL

Fixed in:0:11.9-8.el9_2.2RHSA-2024:1803

Fixed in:0:11.9-9.el9_4RHSA-2024:2551

Fixed in:0:11.9-7.el9_0.1RHSA-2024:1800

Fixed in:0:11.9-8.el9_2.2RHSA-2024:1803

Fixed in:0:11.9-7.el9_0.1RHSA-2024:1800

Fixed in:0:11.9-8.el9_3.3RHSA-2024:1789

bind-dyndb-ldap-debugsourceRocky

Fixed in:0:11.9-8.el9_3.3RHSA-2024:1789

Fixed in:0:11.9-8.el9_2.2RHSA-2024:1803

Fixed in:0:11.9-9.el9_4RHSA-2024:2551

Fixed in:0:11.9-8.el9_2.2RHSA-2024:1803

Fixed in:0:11.9-8.el9_3.3RHSA-2024:1789

Fixed in:0:11.9-8.el9_2.2RHSA-2024:1803

Fixed in:0:11.9-7.el9_0.1RHSA-2024:1800

Fixed in:0:11.9-8.el9_3.3RHSA-2024:1789

bind-export-develRocky

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.ppcRHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.ppc64RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.s390RHSA-2024:3741

Fixed in:32:9.11.13-6.el8_2.7RHSA-2024:2890

bind-export-develRed Hat / RHEL

Fixed in:32:9.11.4-26.P2.el7_9.16.ppc64RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.s390RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.ppcRHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.36-14.el8_10RHSA-2024:3271

bind-export-libsRed Hat / RHEL

Fixed in:32:9.11.4-26.P2.el7_9.16.s390RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.ppc64RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.ppcRHSA-2024:3741

Fixed in:32:9.11.36-8.el8_8.4RHSA-2024:2721

bind-export-libsRocky

Fixed in:32:9.11.4-26.P2.el7_9.16.s390RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.ppcRHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16.ppc64RHSA-2024:3741

Fixed in:32:9.11.4-26.P2.el7_9.16RHSA-2024:3741

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

bind-export-libs-debuginfoRed Hat / RHEL

Fixed in:32:9.11.36-3.el8_6.7RHSA-2024:2720

Fixed in:32:9.11.36-14.el8_10RHSA-2024:3271

Fixed in:32:9.11.36-11.el8_9.1RHSA-2024:1782

Fixed in:32:9.11.36-8.el8_8.4RHSA-2024:2721

Fixed in:32:9.11.26-4.el8_4.4RHSA-2024:2821

Fixed in:32:9.11.36-8.el8_8.4RHSA-2024:2721

Fixed in:32:9.11.26-4.el8_4.4RHSA-2024:2821

This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.34%probability of exploitation in 30 days

69thpercentile

Moderate risk: more likely to be exploited than 69% of all known CVEs.

References

Vendor Advisory1

kb.isc.org

Third-Party Advisory6

Related Vulnerabilities

Other CWE-407 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-27223	Medium	5.2	78%	-	Fix
CVE-2022-36021	Medium	5.5	60%	-	Fix
CVE-2021-33582	High	7.5	3.1%	-	Fix
CVE-2024-43485	High	7.5	3.1%	-	Fix
CVE-2024-43484	High	7.5	2.9%	-	Fix
CVE-2016-10396	High	7.5	2.9%	-	-

Common questions

How do I fix CVE-2023-4408?

Published advisories record a fix for 126 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2023-4408 being actively exploited?

Not that we know of. CVE-2023-4408 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 69% of all scored CVEs.

How severe is CVE-2023-4408?

CVE-2023-4408 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2023-4408 affect?

Published advisories record a fix for bind9 (Debian), bind (Rocky), bind (Red Hat / RHEL), bind-chroot (Red Hat / RHEL), and 122 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2023-4408

Markdown

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-03-14.