Reachable Assertion Affecting bind-dnssec-utils-debuginfo package, versions <32:9.18.33-1.amzn2023.0.3


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.03% (6th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-AMZN2023-BINDDNSSECUTILSDEBUGINFO-11335872
  • published30 Jul 2025
  • disclosed16 Jul 2025

Introduced: 16 Jul 2025

NewCVE-2025-40777  (opens in a new tab)
CWE-617  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 bind-dnssec-utils-debuginfo to version 32:9.18.33-1.amzn2023.0.3 or higher.
This issue was patched in ALAS2023-2025-1105.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bind-dnssec-utils-debuginfo package and not the bind-dnssec-utils-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

If a named caching resolver is configured with serve-stale-enable yes, and with stale-answer-client-timeout set to 0 (the only allowable value other than disabled), and if the resolver, in the process of resolving a query, encounters a CNAME chain involving a specific combination of cached or authoritative records, the daemon will abort with an assertion failure. This issue affects BIND 9 versions 9.20.0 through 9.20.10, 9.21.0 through 9.21.9, and 9.20.9-S1 through 9.20.10-S1.

CVSS Base Scores

version 3.1