Bug 1727208 (CVE-2019-10190)

Summary:	CVE-2019-10190 knot-resolver: improper input validation in DNS resolver allows remote attacker to bypass DNSSEC validation
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, sfowler
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 08:40:43 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:	1729824, 1729825
Bug Blocks:

Description Dhananjay Arunesh 2019-07-05 04:02:52 UTC

A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.0.0 which allows  remote attacker to bypass DNSSEC validation for non-existence answer. Where NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see the other CVE.

Comment 3 Dhananjay Arunesh 2019-07-05 09:26:56 UTC

Acknowledgments:

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

Comment 5 Dhananjay Arunesh 2019-07-15 03:46:02 UTC

Created knot-resolver tracking bugs for this issue:

Affects: epel-7 [bug 1729825]
Affects: fedora-all [bug 1729824]

Comment 6 Product Security DevOps Team 2019-07-15 08:40:43 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.