Bug 1411387 (CVE-2016-9778)

Summary:	CVE-2016-9778 bind: assertion failure while handling certain queries using the nxdomain-redirect feature
Product:	[Other] Security Response	Reporter:	Dhiru Kholia <dkholia>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	pemensik, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-01-12 08:23:28 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1411339

Description Dhiru Kholia 2017-01-09 15:33:13 UTC

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

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.

Note that 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.

This description is borrowed from the upstream advisory.

Comment 1 Dhiru Kholia 2017-01-09 15:33:21 UTC

Acknowledgments:

Name: ISC

Comment 2 Martin Prpič 2017-01-12 08:09:46 UTC

External References:

https://kb.isc.org/article/AA-01442/0