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CVE-2023-4408

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CVE-2023-4408

Published: Feb 13, 2024

Modified: Mar 14, 2025

PUBLISHED

CVSS v3.1

7.5

HIGH

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.

VendorProductVersions

ISC

BIND 9

affected
9.0.0 - <= 9.16.45
affected
9.18.0 - <= 9.18.21
affected
9.19.0 - <= 9.19.19
affected
9.9.3-S1 - <= 9.11.37-S1
affected
9.16.8-S1 - <= 9.16.45-S1

+1 more versions

CVSS v3.1 Details

CVSS v3.1 Vector

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

None

Integrity

None

Availability

High

References

CVE-2023-4408
vendor-advisory

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