CVE-2018-5736: ISC BIND

Medium severity, CVSS 5.3. EPSS: 18% chance of exploitation in the next 30 days.

An error in zone database reference counting can lead to an assertion failure if a server which is running an affected version of BIND attempts several transfers of a slave zone in quick succession. This defect could be deliberately exercised by an attacker who is permitted to cause a vulnerable server to initiate zone transfers (for example: by sending valid NOTIFY messages), causing the named process to exit after failing the assertion test. Affects BIND 9.12.0 and 9.12.1.

Affected products

• ISC BIND: version 9.12.0 only; version 9.12.1 only
• Netapp Cloud Backup: affected versions not specified
• Netapp Data Ontap Edge: affected versions not specified

Published 2019-01-16. Last modified 2026-06-17.