Release Notes for BIND Version 9.12.2-P2


This document summarizes changes since the last production release on the BIND 9.12 branch. Please see the CHANGES for a further list of bug fixes and other changes.


The latest versions of BIND 9 software can always be found at There you will find additional information about each release, source code, and pre-compiled versions for Microsoft Windows operating systems.

Security Fixes

  • There was a long-existing flaw in the documentation for ms-self, krb5-self, ms-subdomain, and krb5-subdomain rules in update-policy statements. Though the policies worked as intended, operators who configured their servers according to the misleading documentation may have thought zone updates were more restricted than they were; users of these rule types are advised to review the documentation and correct their configurations if necessary. New rule types matching the previously documented behavior will be introduced in a future maintenance release. [GL !708]

  • named could crash during recursive processing of DNAME records when deny-answer-aliases was in use. This flaw is disclosed in CVE-2018-5740. [GL #387]

New Features

  • None.

Feature Changes

  • None.

Bug Fixes

  • Running rndc reconfig could cause inline-signing to stop signing. [GL #439]

  • Reloading all zones caused zone maintenance to stop for inline-signing zones. [GL #435]

  • Signatures loaded from the journal for the signed version inline-signing zone were not scheduled for refresh. [GL #482]

  • A referral response with a non-empty ANSWER section was incorrectly treated as an error; this caused certain domains to be non-resolvable. [GL #390]


BIND is open source software licenced under the terms of the Mozilla Public License, version 2.0 (see the LICENSE file for the full text).

The license requires that if you make changes to BIND and distribute them outside your organization, those changes must be published under the same license. It does not require that you publish or disclose anything other than the changes you have made to our software. This requirement does not affect anyone who is using BIND, with or without modifications, without redistributing it, nor anyone redistributing BIND without changes.

Those wishing to discuss license compliance may contact ISC at

End of Life

The end-of-life date for BIND 9.12 has not yet been determined. However, it is not intended to be an Extended Support Version (ESV) branch; accordingly, support will end after the next stable branch (9.14) becomes available. Those needing a longer-lived branch are encouraged to use the current ESV, BIND 9.11, which will be supported until December 2021. See for details of ISC's software support policy.

Thank You

Thank you to everyone who assisted us in making this release possible. If you would like to contribute to ISC to assist us in continuing to make quality open source software, please visit our donations page at