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CVE-2016-9778

7.5 · HIGH

An error in handling certain queries can cause an assertion failure when a server is using the nxdomain-redirect feature to cover a zone for which it is also providing authoritative service.

Published Jan 16, 2019CWE-388EPSS 6.84%

Overview

CVE-2016-9778 is a high-severity vulnerability. It was published on January 16, 2019 and has a CVSS 3.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

An error in handling certain queries can cause an assertion failure when a server is using the nxdomain-redirect feature to cover a zone for which it is also providing authoritative service. A vulnerable server could be intentionally stopped by an attacker if it was using a configuration that met the criteria for the vulnerability and if the attacker could cause it to accept a query that possessed the required attributes. Please note: This vulnerability affects the "nxdomain-redirect" feature, which is one of two methods of handling NXDOMAIN redirection, and is only available in certain versions of BIND. Redirection using zones of type "redirect" is not affected by this vulnerability. Affects BIND 9.9.8-S1 -> 9.9.8-S3, 9.9.9-S1 -> 9.9.9-S6, 9.11.0-9.11.0-P1.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.securityfocus.com/bid/95388Refwww.securitytracker.com/id/1037582Refkb.isc.org/article/AA-01442/Refsecurity.gentoo.org/glsa/201708-01Refsecurity.netapp.com/advisory/ntap-20180926-0005/Refwww.securityfocus.com/bid/95388Refwww.securitytracker.com/id/1037582Refkb.isc.org/article/AA-01442/Refsecurity.gentoo.org/glsa/201708-01Refsecurity.netapp.com/advisory/ntap-20180926-0005/

How CyberStrike helps

Frequently asked questions

What is CVE-2016-9778?

CVE-2016-9778 is a high-severity vulnerability. It was published on January 16, 2019 and has a CVSS 3.0 base score of 7.5 (HIGH).

How severe is CVE-2016-9778?

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2016-9778?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2016-9778?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-9778 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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