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CVE-2023-4408— Parsing large DNS messages may cause excessive CPU load

Quick assessment

Affected
ISC BIND 9
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ISC BIND是美国ISC公司的一套实现了DNS协议的开源软件。 ISC BIND 存在安全漏洞，该漏洞源于精心设计的查询和响应可能会造成过多的CPU负载。

CVSS 7.5 · High EPSS 1.34% · P70

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2023-4408

Vulnerability Information
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Vulnerability Title
Parsing large DNS messages may cause excessive CPU load
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
ISC BIND 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ISC BIND是美国ISC公司的一套实现了DNS协议的开源软件。 ISC BIND 存在安全漏洞，该漏洞源于精心设计的查询和响应可能会造成过多的CPU负载。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ISC BIND 9 9.0.0 ~ 9.16.45 -

II. Public POCs for CVE-2023-4408

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III. Intelligence Information for CVE-2023-4408

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Vendor Advisories for CVE-2023-4408 (1)

Mailing List Discussions for CVE-2023-4408 (5)

Other References for CVE-2023-4408 (1)

Same Patch Batch · ISC · 2024-02-13 · 5 CVEs total

CVE-2023-5517 7.5 HIGH Querying RFC 1918 reverse zones may cause an assertion failure when "nxdomain-redirect" is
CVE-2023-5679 7.5 HIGH Enabling both DNS64 and serve-stale may cause an assertion failure during recursive resolu
CVE-2023-6516 7.5 HIGH Specific recursive query patterns may lead to an out-of-memory condition
CVE-2023-5680 5.3 MEDIUM Cleaning an ECS-enabled cache may cause excessive CPU load

IV. Related Vulnerabilities

Same product: BIND 9
Same vendor: ISC

V. Comments for CVE-2023-4408

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