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Date: Wed, 24 Apr 2019 22:55:00 -0800
From: Michael McNally <>
Subject: Multiple BIND vulnerabilities disclosed (CVE-2018-5743,
 CVE-2019-6467, and CVE-2019-6468)

Today ISC disclosed two vulnerabilities affecting BIND as well
as a third vulnerability which affects *only* BIND Supported Preview
Edition (a special feature-preview version of BIND provided to
ISC support customers.)

Information about the vulnerabilities can be found in the ISC Knowledge

   CVE-2018-5743: Limiting simultaneous TCP clients is ineffective

   CVE-2019-6467: An error in the nxdomain redirect feature can cause
   BIND to exit with an INSIST assertion failure in query.c

   CVE-2019-6468: BIND Supported Preview Edition can exit with an
   assertion failure if nxdomain-redirect is used

New releases of BIND have been issued to fix the vulnerabilities above.
They may be downloaded from the ISC website:

   -  9.11.6-P1
   -  9.12.4-P1
   -  9.14.1

With the public disclosure of these vulnerabilities, parties which
had been given advance notice concerning them are released from
non-disclosure and packagers and redistributors are encouraged to
publish updated packages containing fixes.

If you have additional questions, please direct them to

Thank you,

Michael McNally
ISC Security Officer

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