Operational Notification: Change 4892 exposed multiple problems affecting DNSSEC inline-signing
  • 29 Oct 2018
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Operational Notification: Change 4892 exposed multiple problems affecting DNSSEC inline-signing

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Article Summary

Posting date: 19 September 2018

Program Impacted: BIND

Versions affected: 9.10.8 -> 9.10.8-P1, 9.11.4 -> 9.11.4-P1, 9.12.1 -> 9.12.2-P1. Also versions 9.13.0 -> 9.13.3 of the 9.13 development branch.

Description

A code change intended to fix a memory leak that could occur after "rndc reload" exposed multiple problems with inline-signing that were not possible to trigger in versions prior to change 4892.

Impact: In versions containing change #4892 but prior to the correction of the multiple related issues, it is possible for inline-signing to fail to properly sign records or to properly service refresh events. inline-signing should be considered broken in the affected versions and operators should either upgrade to a corrected version or revert to traditional signing.

Workarounds: traditional signing can be used instead of inline-signing.

Solution

If you are running a version affected by this bug, you can prevent it by upgrading to a release containing the fix which reverses the change in behavior. The patched versions can all be downloaded from http://www.isc.org/downloads/.

  • BIND 9 version 9.11.4-P2
  • BIND 9 version 9.12.2-P2

Do you still have questions? Questions regarding this advisory should go to security-officer@isc.orgTo report a new issue, please encrypt your message using security-officer@isc.org's PGP key which can be found here: https://www.isc.org/downloads/software-support-policy/openpgp-key/. If you are unable to use encrypted email, you may also report new issues at: https://www.isc.org/community/report-bug/.

Note: ISC patches only currently supported versions. When possible we indicate EOL versions affected.  (For current information on which versions are actively supported, please see https://www.isc.org/downloads/). 

ISC Security Vulnerability Disclosure Policy: Details of our current security advisory policy and practice can be found here: ISC Software Defect and Security Vulnerability Disclosure Policy.

This Knowledgebase article is the complete and official security advisory document.

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