CVE-2017-3135

Combination of DNS64 and RPZ Can Lead to Crash

Published Jan 16, 2019 CVSS 3.0 · 7.5 High EPSS 17.1% KEV · Not listed
Description
Under some conditions when using both DNS64 and RPZ to rewrite query responses, query processing can resume in an inconsistent state leading to either an INSIST assertion failure or an attempt to read through a NULL pointer. Affects BIND 9.8.8, 9.9.3-S1 -> 9.9.9-S7, 9.9.3 -> 9.9.9-P5, 9.9.10b1, 9.10.0 -> 9.10.4-P5, 9.10.5b1, 9.11.0 -> 9.11.0-P2, 9.11.1b1.

Remediation

Vendor Solution

Upgrade to the patched release most closely related to your current version of BIND. These can all be downloaded from http://www.isc.org/downloads. BIND 9 version 9.9.9-P6 BIND 9 version 9.10.4-P6 BIND 9 version 9.11.0-P3 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. BIND 9 version 9.9.9-S8


Vendor Workaround

While it is possible to avoid the condition by removing either DNS64 or RPZ from the configuration, or by carefully restricting the contents of the policy zone, for an affected configuration the most practical and safest course of action is to upgrade to a version of BIND without this vulnerability.

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-843-1 bind9 security update
Debian DSA Debian DSA DSA-3795-1 bind9 security update
Ubuntu USN Ubuntu USN USN-3201-1 Bind vulnerabilities
History

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