Bug 1463642 (CVE-2017-7508, CVE-2017-7520, CVE-2017-7521, CVE-2017-7522)

Summary:	CVE-2017-7508 CVE-2017-7520 CVE-2017-7521 CVE-2017-7522 openvpn: Multiple security issues fixed in OpenVPN 2.4.3 and 2.3.17
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	amaris, dazo, huzaifas, mauricio.teixeira, skontar, steve
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	openvpn 2.4.3, openvpn 2.3.17	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-08-24 09:22:52 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:	1463643, 1463644
Bug Blocks:	1463872

Description Adam Mariš 2017-06-21 12:17:09 UTC

Multiple security issues were fixed in OpenVPN 2.4.3 and 2.3.17, specifically:

CVE-2017-7508: Remotely-triggerable ASSERT() on malformed IPv6 packet

https://github.com/OpenVPN/openvpn/commit/c3f47077a7

CVE-2017-7520: Pre-authentication remote crash/information disclosure for clients

https://github.com/OpenVPN/openvpn/commit/7718c8984f

CVE-2017-7521: Issues in extract_x509_extension() leading to server memory drain/crash/double-free

https://github.com/OpenVPN/openvpn/commit/cb4e35ece4
https://github.com/OpenVPN/openvpn/commit/2d032c7fcd

CVE-2017-7522: Post-authentication remote DoS when using the --x509-track option

https://github.com/OpenVPN/openvpn/commit/426392940c

External References:

https://community.openvpn.net/openvpn/wiki/VulnerabilitiesFixedInOpenVPN243
https://guidovranken.wordpress.com/2017/06/21/the-openvpn-post-audit-bug-bonanza/

Comment 1 Adam Mariš 2017-06-21 12:17:28 UTC

Acknowledgments:

Name: the OpenVPN project
Upstream: Guido Vranken

Comment 2 Adam Mariš 2017-06-21 12:17:50 UTC

Created openvpn tracking bugs for this issue:

Affects: epel-all [bug 1463644]
Affects: fedora-all [bug 1463643]

Comment 9 Vincent Danen 2017-06-23 17:03:51 UTC

Statement:

This issue does not affect Red Hat Enterprise Linux 5, 6 and 7 as OpenVPN is not included in any of Red Hat's supported products.