CVE-2024-12705

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

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

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.

Workaround:

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

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.07%
Vendor Advisory isc.org
Affected: ISC BIND 9
Published at:
Updated at:

References

Link Tags
https://kb.isc.org/docs/cve-2024-12705 vendor advisory
https://security.netapp.com/advisory/ntap-20250207-0003/

Frequently Asked Questions

What is the severity of CVE-2024-12705?
CVE-2024-12705 has been scored as a high severity vulnerability.
How to fix CVE-2024-12705?
To fix CVE-2024-12705: 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.
Is CVE-2024-12705 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-12705 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-12705?
CVE-2024-12705 affects ISC BIND 9.
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