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.
Metrics
Affected Vendors & Products
References
Link | Providers |
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https://kb.isc.org/docs/cve-2025-40776 |
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History
Tue, 22 Jul 2025 15:15:00 +0000
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Metrics |
ssvc
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Wed, 16 Jul 2025 13:45:00 +0000
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Description | 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. | |
Title | Birthday Attack against Resolvers supporting ECS | |
Weaknesses | CWE-349 | |
References |
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Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: isc
Published: 2025-07-16T13:41:01.337Z
Updated: 2025-07-22T14:55:04.420Z
Reserved: 2025-04-16T08:44:49.856Z
Link: CVE-2025-40776

Updated: 2025-07-22T14:55:00.920Z

Status : Awaiting Analysis
Published: 2025-07-16T14:15:25.053
Modified: 2025-07-16T14:58:59.837
Link: CVE-2025-40776

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