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CVE-2023-5680— Cleaning an ECS-enabled cache 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 9.11.3-S1 到 9.11.37-S1、9.16.8-S1 到 9.16.45-S1 以及 9.18.11-S1 到 9.18.21-S1版本存在安全漏洞，该漏洞源于如果解析器缓存存储了大量同名 ECS 记录，则清理该名称的缓存数据库节点可能会严重影响查询性能。

CVSS 5.3 · Medium EPSS 0.63% · P49
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I. Basic Information for CVE-2023-5680

Vulnerability Information
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Vulnerability Title
Cleaning an ECS-enabled cache may cause excessive CPU load
Source: CVE Program / CVE List V5
Vulnerability Description
If a resolver cache has a very large number of ECS records stored for the same name, the process of cleaning the cache database node for this name can significantly impair query performance. This issue affects BIND 9 versions 9.11.3-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:L
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 9.11.3-S1 到 9.11.37-S1、9.16.8-S1 到 9.16.45-S1 以及 9.18.11-S1 到 9.18.21-S1版本存在安全漏洞，该漏洞源于如果解析器缓存存储了大量同名 ECS 记录，则清理该名称的缓存数据库节点可能会严重影响查询性能。
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 9.11.3-S1 ~ 9.11.37-S1 -

II. Public POCs for CVE-2023-5680

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III. Intelligence Information for CVE-2023-5680

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Vendor Advisories for CVE-2023-5680 (1)

Other References for CVE-2023-5680 (1)

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

CVE-2023-4408 7.5 HIGH Parsing large DNS messages may cause excessive CPU load
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

IV. Related Vulnerabilities

Same product: BIND 9
Same vendor: ISC

V. Comments for CVE-2023-5680

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