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CVE-2024-1975— SIG(0) can be used to exhaust CPU resources

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ISC开源的一套实现了DNS协议的开源软件。 ISC BIND 9存在安全漏洞，该漏洞源于SIG(0)可用于耗尽CPU资源。

CVSS 7.5 · High EPSS 2.11% · P80

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2024-1975

Vulnerability Information
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Vulnerability Title
SIG(0) can be used to exhaust CPU resources
Source: CVE Program / CVE List V5
Vulnerability Description
If a server hosts a zone containing a "KEY" Resource Record, or a resolver DNSSEC-validates a "KEY" Resource Record from a DNSSEC-signed domain in cache, a client can exhaust resolver CPU resources by sending a stream of SIG(0) signed requests. This issue affects BIND 9 versions 9.0.0 through 9.11.37, 9.16.0 through 9.16.50, 9.18.0 through 9.18.27, 9.19.0 through 9.19.24, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.49-S1, and 9.18.11-S1 through 9.18.27-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ISC开源的一套实现了DNS协议的开源软件。 ISC BIND 9存在安全漏洞，该漏洞源于SIG(0)可用于耗尽CPU资源。
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 ~ 9.11.37 -

II. Public POCs for CVE-2024-1975

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III. Intelligence Information for CVE-2024-1975

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Mailing List Discussions for CVE-2024-1975 (2)

Other References for CVE-2024-1975 (1)

Same Patch Batch · ISC · 2024-07-23 · 4 CVEs total

CVE-2024-0760 7.5 HIGH A flood of DNS messages over TCP may make the server unstable
CVE-2024-1737 7.5 HIGH BIND's database will be slow if a very large number of RRs exist at the same name
CVE-2024-4076 7.5 HIGH Assertion failure when serving both stale cache data and authoritative zone content

IV. Related Vulnerabilities

Same product: BIND 9
Same vendor: ISC

V. Comments for CVE-2024-1975

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