Acceptance of Extraneous Untrusted Data With Trusted Data Affecting bind package, versions [9.0.0,9.20.10)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published21 Jul 2025
- disclosed16 Jul 2025
- creditUnknown
Introduced: 16 Jul 2025
NewCVE-2025-40776 (opens in a new tab)How to fix?
Upgrade bind to version 9.20.10 or higher.
Overview
Affected versions of this package are vulnerable to Acceptance of Extraneous Untrusted Data With Trusted Data via the ecs-zones process. An attacker can inject malicious DNS records into the cache by exploiting the way ECS (EDNS Client Subnet) options are handled in DNS queries, potentially causing clients to receive incorrect DNS responses.
Workaround
This vulnerability can be mitigated by disabling ECS in BIND by removing the ecs-zones option from named.conf.