CVE-2017-3136

An error handling synthesized records could cause an assertion failure when using DNS64 with "break-dnssec yes;"

Description

A query with a specific set of characteristics could cause a server using DNS64 to encounter an assertion failure and terminate. An attacker could deliberately construct a query, enabling denial-of-service against a server if it was configured to use the DNS64 feature and other preconditions were met. Affects BIND 9.8.0 -> 9.8.8-P1, 9.9.0 -> 9.9.9-P6, 9.9.10b1->9.9.10rc1, 9.10.0 -> 9.10.4-P6, 9.10.5b1->9.10.5rc1, 9.11.0 -> 9.11.0-P3, 9.11.1b1->9.11.1rc1, 9.9.3-S1 -> 9.9.9-S8.

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-P8 BIND 9 version 9.10.4-P8 BIND 9 version 9.11.0-P5 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. BIND 9 version 9.9.9-S10 New maintenance releases of BIND are also scheduled which contain the fix for this vulnerability. In addition to the security releases listed above, fixes for this vulnerability are also included in these release candidate versions: BIND 9 version 9.9.10rc3 BIND 9 version 9.10.5rc3 BIND 9 version 9.11.1rc3

Workaround:

  • Servers which have configurations which require DNS64 and "break-dnssec yes;" should upgrade. Servers which are not using these features in conjunction are not at risk from this defect.

Category

5.9
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 38.17% Top 5%
Vendor Advisory redhat.com Vendor Advisory gentoo.org Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory isc.org
Affected: ISC BIND 9
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2017:1095 third party advisory vendor advisory
https://security.gentoo.org/glsa/201708-01 third party advisory vendor advisory
https://security.netapp.com/advisory/ntap-20180802-0002/ third party advisory
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03747en_us third party advisory
https://www.debian.org/security/2017/dsa-3854 third party advisory vendor advisory
http://www.securitytracker.com/id/1038259 vdb entry third party advisory
http://www.securityfocus.com/bid/97653 vdb entry third party advisory
https://access.redhat.com/errata/RHSA-2017:1105 third party advisory vendor advisory
https://kb.isc.org/docs/aa-01465 vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-3136?
CVE-2017-3136 has been scored as a medium severity vulnerability.
How to fix CVE-2017-3136?
To fix CVE-2017-3136: 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-P8 BIND 9 version 9.10.4-P8 BIND 9 version 9.11.0-P5 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. BIND 9 version 9.9.9-S10 New maintenance releases of BIND are also scheduled which contain the fix for this vulnerability. In addition to the security releases listed above, fixes for this vulnerability are also included in these release candidate versions: BIND 9 version 9.9.10rc3 BIND 9 version 9.10.5rc3 BIND 9 version 9.11.1rc3
Is CVE-2017-3136 being actively exploited in the wild?
It is possible that CVE-2017-3136 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~38% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-3136?
CVE-2017-3136 affects ISC BIND 9.
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