CVE-2024-12705Network attack vector

DoH service interruption via unthrottled HTTP/2 processing

Published Jan 29, 2025 · Updated Feb 7, 2025

Resource exhaustion in ISC BIND 9 allows remote attackers to interrupt DNS-over-HTTPS service with crafted HTTP/2 traffic. The named daemon processes incoming HTTP/2 data without adequate chunking or read throttling and can retain connections in CLOSE_WAIT indefinitely. Only DoH-enabled instances are exposed; flooding consumes CPU or memory and blocks legitimate clients from establishing DoH connections.

CVSS severity7.5
High
EPSS probability18.37%
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 ISC BIND 9 allows remote attackers to interrupt DNS-over-HTTPS service with crafted HTTP/2 traffic. The named daemon processes incoming HTTP/2 data without adequate chunking or read throttling and can retain connections in CLOSE_WAIT indefinitely. Only DoH-enabled instances are exposed; flooding consumes CPU or memory and blocks legitimate clients from establishing DoH connections.

The record

CVE
CVE-2024-12705
Published
Jan 29, 2025
Updated
Feb 7, 2025
Vendor
Internet Systems Consortium
Product
BIND 9
Classifications
CWE-770, T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 29, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 7, 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=9.18.0 <=9.18.32
  2. Affected versionversion=9.18.11-S1 <=9.18.32-S1
  3. Affected versionversion=9.20.0 <=9.20.4
  4. 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=9.18.0 <=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 Consortium (ISC)CVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.002Service 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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