CVE-2019-6465: Controls for zone transfers might not be properly applied to Dynamically Loadable Zones (DLZs) if the zones are writable.
Michael McNally
mcnally at isc.org
Thu Feb 21 23:04:03 UTC 2019
CVE: CVE-2019-6465
Document version: 2.0
Posting date: 21 February 2019
Program impacted: BIND
Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.5-P2,
9.12.0 -> 9.12.3-P2, 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-2019-6465.
Severity: Medium
Exploitable: Remotely
Description:
Controls for zone transfers may not be properly applied to
Dynamically Loadable Zones (DLZs) if the zones are writable.
Impact:
A client exercising this defect can request and receive a zone
transfer of a DLZ even when not permitted to do so by the
allow-transfer ACL.
CVSS Score: 5.3
CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
For more information on the Common Vulnerability Scoring System and
to obtain your specific environmental score please visit:
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
Workarounds: None
Active exploits: None known.
Solution:
Upgrade to the patched release most closely related to your
current version of BIND:
+ BIND 9.11.5-P4
+ BIND 9.12.3-P4
BIND Supported Preview Edition is a special feature preview
branch of BIND provided to eligible ISC support customers.
+ BIND 9.11.5-S5
Document revision history:
1.0 Early Notification, 28 January 2019
2.0 Public Disclosure, 21 February 2019
Related documents:
See our BIND 9 Security Vulnerability Matrix for a complete
listing of security vulnerabilities and versions affected.
Do you still have questions? Questions regarding this advisory
should go to security-officer at isc.org. To report a new issue, please
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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 in the ISC Software Defect and Security Vulnerability
Disclosure Policy.
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