CVE-2025-40776
8.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| ISC | BIND 9 | 9.11.3-S1 <= 9.16.50-S1 | affected |
| ISC | BIND 9 | 9.18.11-S1 <= 9.18.37-S1 | affected |
| ISC | BIND 9 | 9.20.9-S1 <= 9.20.10-S1 | affected |
| ISC | BIND 9 | 9.0.0 <= 9.20.10 | unaffected |
Weaknesses
- CWE-349: CWE-349 Acceptance of Extraneous Untrusted Data With Trusted Data
Workarounds
Disable ECS in BIND by removing the ecs-zones option from named.conf.
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
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