What’s Vulnerable › Vulnerabilities

CVE-2024-11187: Many records in the additional section cause CPU exhaustion

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 15.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-01-29 · updated 2026-06-17
• Weakness: CWE-405

Description

It is possible to construct a zone such that some queries to it will generate responses containing numerous records in the Additional section. An attacker sending many such queries can cause either the authoritative server itself or an independent resolver to use disproportionate resources processing the queries. Zones will usually need to have been deliberately crafted to attack this exposure. This issue affects BIND 9 versions 9.11.0 through 9.11.37, 9.16.0 through 9.16.50, 9.18.0 through 9.18.32, 9.20.0 through 9.20.4, 9.21.0 through 9.21.3, 9.11.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.50-S1, and 9.18.11-S1 through 9.18.32-S1.

Affected products

• ISC BIND: from 9.11.0 through 9.11.37; from 9.16.0 through 9.16.50; from 9.18.0 through 9.18.32; from 9.20.0 through 9.20.4; from 9.21.0 through 9.21.3; from 9.11.3-S1 through 9.11.37-S1

References

• https://kb.isc.org/docs/cve-2024-11187
• https://lists.debian.org/debian-lts-announce/2025/02/msg00011.html
• https://security.netapp.com/advisory/ntap-20250207-0002/

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