CVE-2025-40776

Birthday Attack against Resolvers supporting ECS

CVSS 8.6 HIGHEPSS 0.2%CWE-349

A `named` caching resolver that is configured to send ECS (EDNS Client Subnet) options may be vulnerable to a cache-poisoning attack. This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Productos afectados

ISC · BIND 9

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Referencias

https://kb.isc.org/docs/cve-2025-40776