CVE-2016-9778: An error handling certain queries using the nxdomain-redirect feature could cause a REQUIRE assertion failure in db.c
First published: Wed Jan 16 2019(Updated: )
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.
Credit: security-officer@isc.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ISC BIND | =9.9.8-s1 | |
| ISC BIND | =9.9.8-s2 | |
| ISC BIND | =9.9.8-s3 | |
| ISC BIND | =9.9.9-s1 | |
| ISC BIND | =9.9.9-s6 | |
| ISC BIND | =9.11.0 | |
| ISC BIND | =9.11.0-p1 | |
| Netapp Data Ontap Edge | ||
| Netapp Solidfire Element Os Management Node |
Remedy
Upgrade to the patched release most closely related to your current version of BIND. These can be downloaded from http://www.isc.org/downloads. BIND 9 version 9.11.0-P2 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. BIND 9.9.9-S7
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Reference Links
Frequently Asked Questions
What is the vulnerability ID of this vulnerability?
The vulnerability ID of this vulnerability is CVE-2016-9778.
What is the severity level of CVE-2016-9778?
The severity level of CVE-2016-9778 is high.
What software versions are affected by CVE-2016-9778?
The software versions affected by CVE-2016-9778 are ISC BIND 9.9.8-s1, 9.9.8-s2, 9.9.8-s3, 9.9.9-s1, 9.9.9-s6, 9.11.0, and 9.11.0-p1.
What can happen to a vulnerable server using the nxdomain-redirect feature?
A vulnerable server using the nxdomain-redirect feature can experience an assertion failure and be intentionally stopped by an attacker.
Where can I find more information about CVE-2016-9778?
You can find more information about CVE-2016-9778 at the following references: http://www.securityfocus.com/bid/95388, http://www.securitytracker.com/id/1037582, https://kb.isc.org/article/AA-01442/
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