Executive Summary

CVE-2018-5745 affects BIND 9.x resolvers using managed‑keys. During key rollover, if a trust anchor’s keys are replaced with unsupported algorithms, the server can crash via an assertion failure. Affected releases include 9.9.0‑9.10.8-P1, 9.11.0‑9.11.5-P1, 9.12.0‑9.12.3-P1, 9.9.3‑S1‑9.11.5-S3, and 9.13.0‑9.13.6. Operators should upgrade or disable managed‑keys to avoid denial‑of‑service.

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Authoritative CVE Metadata - CVSS Base Score: 4.9 (MEDIUM) - Published: 2019-10-09T16:15:14.000 - Last Modified: 2026-09-01T19:44:42.623

Original Description: "managed-keys" is a feature which allows a BIND resolver to automatically maintain the keys used by trust anchors which operators configure for use in DNSSEC validation. Due to an error in the managed-keys feature it is possible for a BIND server which uses managed-keys to exit due to an assertion failure if, during key rollover, a trust anchor's keys are replaced with keys which use an unsupported algorithm. Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.5-P1, 9.12.0 -> 9.12.3-P1, and versions 9.9.3-S1 -> 9.11.5-S3 of BIND 9 Supported Preview Edition. Versions 9.13.0 -> 9.13.6 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2018-5745.

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