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CVE-2023-4408

25
FAUCET Score

CVE-2023-4408 describes a high-complexity DNS message parsing vulnerability in BIND 9 versions 9.0.0 through 9.19.19 and various S-series releases. This flaw allows specially crafted DNS queries or responses to cause excessive CPU load on affected named instances, impacting both authoritative servers and recursive resolvers. With a CVSS score of 7.5 (High), the vulnerability can lead to denial of service (A:H) without requiring user interaction or privileges. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
9.14.1CPE matchmatch criteria
cpe:2.3:a:netapp:ontap:9.14.1:*:*:*:*:*:*:*
9.15.1CPE matchmatch criteria
cpe:2.3:a:netapp:ontap:9.15.1:*:*:*:*:*:*:*
38CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
39CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
>= 9.0.0, <= 9.16.45CPE matchmatch criteria
cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.34%
Probability of exploitation in next 30 days
EPSS Percentile
68.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0134 is in the 48th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (46)

denopatch availablevia llm_extracted
View patch
keraspatch availablevia llm_extracted
View patch
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 9.16.48-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 9.16.48-1
microsoftpatch availablevia msrc
Product: cbl2 bind 9.16.48-1 on CBL Mariner 2.0Fixed in: 9.16.48-1
microsoftpatch availablevia msrc
Product: 20093-17086Fixed in: 9.16.48-1
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 ARMFixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 x64Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: azl3 bind 9.16.44-2 on Azure Linux 3.0Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: azl3 bind 9.19.21-1 on Azure Linux 3.0Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 18169-17084Fixed in: 9.19.21-1
microsoftpatch availablevia msrc
Product: 17073-17084Fixed in: 9.19.21-1
nessuspatch availablevia llm_extracted
Fixed in: 9.18.22-S1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceFixed in: bind-32:9.11.26-4.el8_4.4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Telecommunications Update ServiceFixed in: dhcp-12:4.3.6-44.el8_4.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsFixed in: bind-32:9.11.26-4.el8_4.4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Update Services for SAP SolutionsFixed in: dhcp-12:4.3.6-44.el8_4.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: bind9.16-32:9.16.23-0.7.el8_6.5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: bind-32:9.11.36-3.el8_6.7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: dhcp-12:4.3.6-47.el8_6.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: bind9.16-32:9.16.23-0.14.el8_8.4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: bind-32:9.11.36-8.el8_8.4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.8 Extended Update SupportFixed in: dhcp-12:4.3.6-49.el8_8.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: bind-32:9.16.23-14.el9_3.4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: bind-dyndb-ldap-0:11.9-8.el9_3.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: bind-dyndb-ldap-0:11.9-9.el9_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: bind-32:9.16.23-1.el9_0.5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: bind-dyndb-ldap-0:11.9-7.el9_0.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: bind-32:9.16.23-11.el9_2.4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.2 Extended Update SupportFixed in: bind-dyndb-ldap-0:11.9-8.el9_2.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: bind-32:9.16.23-18.el9_4.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSIONFixed in: bind-32:9.8.2-0.68.rc1.el6_10.14
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSIONFixed in: bind-dyndb-ldap-0:2.3-8.el6_10.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: bind-32:9.11.4-26.P2.el7_9.16
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: bind-dyndb-ldap-0:11.1-7.el7_9.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: dhcp-12:4.2.5-83.el7_9.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: bind9.16-32:9.16.23-0.16.el8_9.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: bind-32:9.11.36-11.el8_9.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: bind-32:9.11.36-14.el8_10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Advanced Update SupportFixed in: bind-32:9.11.13-6.el8_2.7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Advanced Update SupportFixed in: dhcp-12:4.3.6-40.el8_2.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportFixed in: bind-32:9.11.26-4.el8_4.4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportFixed in: dhcp-12:4.3.6-44.el8_4.3
View patch
alistgovendor investigatingvia llm_extracted
View patch
consensysvendor investigatingvia llm_extracted
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 10Fixed in: bind

Vendor Advisories (8)

microsoft2024-Dec/CVE-2023-4408

CVE-2023-4408

Dec 10, 2024
denollm-deno-b67a3af2ce0be075CRITICAL

HP ThinPro 8.0 SP 9 Security Updates

Jun 17, 2024
kerasllm-keras-7d8c31fee70361dcCRITICAL

HP ThinPro 8.0 SP 9 Security Updates

Jun 17, 2024
microsoft2024-Feb/CVE-2023-4408Important

Parsing large DNS messages may cause excessive CPU load

Feb 13, 2024
redhatCVE-2023-4408Important

bind9: Parsing large DNS messages may cause excessive CPU load

Feb 13, 2024
nessusllm-nessus-13535f88e879e04a
consensysllm-consensys-cfb7c0ba9848c241
alistgollm-alistgo-717a35bdc26edf83

Parsing large DNS messages may cause excessive CPU load

References

kb.isc.org / docs/cve-2023-4408
Vendor Advisory
lists.fedoraproject.org / archives/list/[email protected]/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/[email protected]/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/[email protected]/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/[email protected]/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R
Mailing ListThird Party Advisory
security.netapp.com / advisory/ntap-20240426-0001
Third Party Advisory
openwall.com / lists/oss-security/2024/02/13/1
Mailing ListThird Party Advisory