Bug 1727211 (CVE-2019-10191)

Summary:	CVE-2019-10191 knot-resolver: improper input validation in DNS resolver allows remote attacker to poison cache by unsigned negative answer
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	jv+fedora, nicki, pspacek, 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:	2019-07-15 08:40:44 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:	1729826, 1729827
Bug Blocks:

Description Dhananjay Arunesh 2019-07-05 04:51:11 UTC

A vulnerability was discovered in DNS resolver of knot resolver before version 4.1.0 which allows remote attacker to downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening possibility of domain hijack using attacks against insecure DNS protocol.

Comment 2 Dhananjay Arunesh 2019-07-05 09:28:02 UTC

Acknowledgments:

Name: Petr Špaček (CZ.NIC)
Upstream: Vladimír Čunát (CZ.NIC)

Comment 4 Dhananjay Arunesh 2019-07-15 03:46:50 UTC

Created knot-resolver tracking bugs for this issue:

Affects: epel-7 [bug 1729827]
Affects: fedora-all [bug 1729826]

Comment 5 Product Security DevOps Team 2019-07-15 08:40:44 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.