CVE-2016-9778

An error handling certain queries using the nxdomain-redirect feature could cause a REQUIRE assertion failure in db.c

Published Jan 16, 2019 CVSS 3.0 · 7.5 High EPSS 6.8% KEV · Not listed
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

Vendor Solution

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


Vendor Workaround

Either provide an ordinary (that is: not redirected) NXDOMAIN for non-existent resource records in zones for which authoritative data is served on the same server or use redirect zones instead of the nxdomain-redirect feature.

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
EUVD EUVD EUVD-2016-10579 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.
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
isc
Published
Updated
Sep 16, 2024, 8:01 PM
Reserved
Dec 2, 2016, 12:00 AM
Status
Modified
Published
Jan 16, 2019, 8:29 PM
Modified
Jun 17, 2026, 12:56 AM
Severity
Important
Public date
Jan 11, 2017, 12:00 AM