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CVE-2023-2828— named's configured cache size limit can be significantly exceeded

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存在安全漏洞，该漏洞源于缓存配置限制不当，攻击者利用该漏洞可以导致拒绝服务条件。

CVSS 7.5 · High EPSS 3.57% · P89

Possible ATT&CK Techniques 1 AI

T1498 · Network Denial of Service
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I. Basic Information for CVE-2023-2828

Vulnerability Information
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Vulnerability Title
named's configured cache size limit can be significantly exceeded
Source: CVE Program / CVE List V5
Vulnerability Description
Every `named` instance configured to run as a recursive resolver maintains a cache database holding the responses to the queries it has recently sent to authoritative servers. The size limit for that cache database can be configured using the `max-cache-size` statement in the configuration file; it defaults to 90% of the total amount of memory available on the host. When the size of the cache reaches 7/8 of the configured limit, a cache-cleaning algorithm starts to remove expired and/or least-recently used RRsets from the cache, to keep memory use below the configured limit. It has been discovered that the effectiveness of the cache-cleaning algorithm used in `named` can be severely diminished by querying the resolver for specific RRsets in a certain order, effectively allowing the configured `max-cache-size` limit to be significantly exceeded. This issue affects BIND 9 versions 9.11.0 through 9.16.41, 9.18.0 through 9.18.15, 9.19.0 through 9.19.13, 9.11.3-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-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 9存在安全漏洞，该漏洞源于缓存配置限制不当，攻击者利用该漏洞可以导致拒绝服务条件。
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 9.11.0 ~ 9.16.41 -

II. Public POCs for CVE-2023-2828

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III. Intelligence Information for CVE-2023-2828

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Vendor Advisories for CVE-2023-2828 (2)

Mailing List Discussions for CVE-2023-2828 (4)

Other References for CVE-2023-2828 (1)

Same Patch Batch · ISC · 2023-06-21 · 3 CVEs total

CVE-2023-2911 7.5 HIGH Exceeding the recursive-clients quota may cause named to terminate unexpectedly when stale
CVE-2023-2829 7.5 HIGH Malformed NSEC records can cause named to terminate unexpectedly when synth-from-dnssec is

IV. Related Vulnerabilities

Same product: BIND 9
Same vendor: ISC

V. Comments for CVE-2023-2828

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