CVE-2024-11187Network attack vector

DNS service interruption via Additional-section record amplification

Published Jan 29, 2025 · Updated Feb 11, 2025

Resource exhaustion in affected ISC BIND 9 releases allows remote attackers to interrupt DNS service by sending crafted queries. Specially constructed zones cause some queries to produce responses with numerous Additional-section records, and repeated queries force named or an independent resolver to spend disproportionate CPU processing them. Exploitation generally requires a deliberately crafted zone; sustained load can prevent responses to other clients without affecting confidentiality or integrity.

CVSS severity7.5
High
EPSS probability16.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in affected ISC BIND 9 releases allows remote attackers to interrupt DNS service by sending crafted queries. Specially constructed zones cause some queries to produce responses with numerous Additional-section records, and repeated queries force named or an independent resolver to spend disproportionate CPU processing them. Exploitation generally requires a deliberately crafted zone; sustained load can prevent responses to other clients without affecting confidentiality or integrity.

The record

CVE
CVE-2024-11187
Published
Jan 29, 2025
Updated
Feb 11, 2025
Vendor
Internet Systems Consortium
Product
BIND 9
Classifications
CWE-405, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 29, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.11.0 <=9.11.37
  2. Affected versionversion=9.11.3-S1 <=9.11.37-S1
  3. Affected versionversion=9.16.0 <=9.16.50
  4. Affected versionversion=9.16.8-S1 <=9.16.50-S1
  5. Affected versionversion=9.18.0 <=9.18.32
  6. Affected versionversion=9.18.11-S1 <=9.18.32-S1
  7. Affected versionversion=9.20.0 <=9.20.4
  8. Affected versionversion=9.21.0 <=9.21.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Internet Systems Consortium · BIND 9version=9.11.0 <=9.11.37; version=9.11.3-S1 <=9.11.37-S1; version=9.16.0 <=9.16.50; version=9.16.8-S1 <=9.16.50-S1; version=9.18.0 <=9.18.32; version=9.18.11-S1 <=9.18.32-S1; version=9.20.0 <=9.20.4; version=9.21.0 <=9.21.3

Published CVSS scores

7.5Internet Systems ConsortiumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-405Asymmetric Resource Consumption (Amplification)
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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