CVE-2024-12705

DNS-over-HTTPS implementation suffers from multiple issues under heavy query load

Published Jan 29, 2025 CVSS 3.1 · 7.5 High EPSS 18.6% KEV · Not listed
Description
Clients using DNS-over-HTTPS (DoH) can exhaust a DNS resolver's CPU and/or memory by flooding it with crafted valid or invalid HTTP/2 traffic.
This issue affects BIND 9 versions 9.18.0 through 9.18.32, 9.20.0 through 9.20.4, 9.21.0 through 9.21.3, and 9.18.11-S1 through 9.18.32-S1.

Remediation

Vendor Solution

Upgrade to the patched release most closely related to your current version of BIND 9: 9.18.33, 9.20.5, 9.21.4, or 9.18.33-S1.


Vendor Workaround

The issue affects only the DNS-over-HTTPS protocol and does not apply to instances where DoH is not enabled.

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Debian DSA Debian DSA DSA-5854-1 bind9 security update
EUVD EUVD EUVD-2024-51062 Clients using DNS-over-HTTPS (DoH) can exhaust a DNS resolver's CPU and/or memory by flooding it with crafted valid or invalid HTTP/2 traffic. This issue affects BIND 9 versions 9.18.0 through 9.18.32, 9.20.0 through 9.20.4, 9.21.0 through 9.21.3, and 9.18.11-S1 through 9.18.32-S1.
Ubuntu USN Ubuntu USN USN-7241-1 Bind vulnerabilities
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00168}

epss

{'score': 0.00082}

Type Values Removed Values Added
First Time appeared Redhat openshift
CPEs cpe:/a:redhat:openshift:4.16::el9
Vendors & Products Redhat openshift
Type Values Removed Values Added
First Time appeared Redhat
Redhat enterprise Linux
CPEs cpe:/a:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Clients using DNS-over-HTTPS (DoH) can exhaust a DNS resolver's CPU and/or memory by flooding it with crafted valid or invalid HTTP/2 traffic. This issue affects BIND 9 versions 9.18.0 through 9.18.32, 9.20.0 through 9.20.4, 9.21.0 through 9.21.3, and 9.18.11-S1 through 9.18.32-S1.
Title DNS-over-HTTPS implementation suffers from multiple issues under heavy query load
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
isc
Published
Updated
Feb 7, 2025, 5:02 PM
Reserved
Dec 17, 2024, 2:25 PM
Status
Deferred
Published
Jan 29, 2025, 10:15 PM
Modified
Jun 17, 2026, 7:00 AM
Severity
Important
Public date
Jan 29, 2024, 12:00 AM