Predictable from Observable State Affecting bind package, versions [,9.18.41)[,9.20.15)[,9.21.14)
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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Test your applications- Snyk IDSNYK-UNMANAGED-BIND-13703826
- published24 Oct 2025
- disclosed22 Oct 2025
- creditAmit Klein, Omer Ben Simhon
Introduced: 22 Oct 2025
NewCVE-2025-40780 (opens in a new tab)How to fix?
Upgrade bind to version 9.18.41, 9.20.15, 9.21.14 or higher.
Overview
Affected versions of this package are vulnerable to Predictable from Observable State due to the weakness in the Pseudo Random Number Generator (PRNG) used for selecting UDP source ports and DNS query IDs. An attacker can compromise the integrity of the resolver cache by predicting these values and injecting spoofed DNS responses through network-level spoofing and precise timing.
##Workaround
This vulnerability can be mitigated by restricting recursive queries to trusted or internal networks, applying rate limiting or firewall rules to prevent excessive requests, enabling DNSSEC validation to reject forged records, isolating recursive resolvers from authoritative servers, and actively monitoring for cache anomalies.