ASA-2019-00232 – BIND: An error in the nxdomain redirect feature can cause BIND to exit with an INSIST assertion failure in query.c

Posted on by Allele Security Intelligence in Alerts

Allele Security Alert

ASA-2019-00232

Identifier(s)

ASA-2019-00232, CVE-2019-6467

Title

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

Vendor(s)

Internet Systems Consortium (ISC)

Product(s)

BIND

Affected version(s)

BIND 9.12.0 to 9.12.4
BIND 9.14.0
All releases in the 9.13 development branch

Fixed version(s)

BIND 9.12.4-P1
BIND 9.14.1

Proof of concept

Unknown

Description

A programming error in the nxdomain-redirect feature can cause an assertion failure in query.c if the alternate namespace used by nxdomain-redirect is a descendant of a zone that is served locally.

The most likely scenario where this might occur is if the server, in addition to performing NXDOMAIN redirection for recursive clients, is also serving a local copy of the root zone or using mirroring to provide the root zone, although other configurations are also possible.

Technical details

Unknown

Credits

Unknown

Reference(s)

CVE-2019-6467: An error in the nxdomain redirect feature can cause BIND to exit with an INSIST assertion failure in query.c
https://kb.isc.org/docs/cve-2019-6467

CVE-2019-6467
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6467

CVE-2019-6467
https://nvd.nist.gov/vuln/detail/CVE-2019-6467

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Last modified: April 27, 2019

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