CVE-2017-3135

Combination of DNS64 and RPZ Can Lead to Crash

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

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

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.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 35.73% Top 5%
Vendor Advisory gentoo.org Vendor Advisory redhat.com Vendor Advisory debian.org Vendor Advisory isc.org
Affected: ISC BIND 9
Published at:
Updated at:

References

Link Tags
https://security.gentoo.org/glsa/201708-01 third party advisory vendor advisory
http://rhn.redhat.com/errata/RHSA-2017-0276.html third party advisory vendor advisory
https://security.netapp.com/advisory/ntap-20180926-0005/ third party advisory
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03747en_us third party advisory
http://www.securityfocus.com/bid/96150 vdb entry third party advisory
http://www.securitytracker.com/id/1037801 vdb entry third party advisory
https://www.debian.org/security/2017/dsa-3795 third party advisory vendor advisory
https://kb.isc.org/docs/aa-01453 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-3135?
CVE-2017-3135 has been scored as a high severity vulnerability.
How to fix CVE-2017-3135?
To fix CVE-2017-3135: 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
Is CVE-2017-3135 being actively exploited in the wild?
It is possible that CVE-2017-3135 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~36% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-3135?
CVE-2017-3135 affects ISC BIND 9.
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