Bug 1497109 (CVE-2017-12166)

Summary:	CVE-2017-12166 openvpn: Incorrect bounds check in read_key() with 'key-method 1'
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dazo, huzaifas, klember, steve
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	openvpn 2.3.18, openvpn 2.4.4	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:26:23 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:	1497110, 1497111
Bug Blocks:

Description Adam Mariš 2017-09-29 08:34:50 UTC

An out-of-bounds write vulnerability was found due to incorrect bounds check in read_key() which was performed after using the value, instead of before. This vulnerability is only exposed when explicitly selecting key-method 1 in the config (or on the command line). This allowed an attacker to send a malformed packet to trigger a stack buffer overflow.

External References:

https://community.openvpn.net/openvpn/wiki/CVE-2017-12166

Comment 1 Adam Mariš 2017-09-29 08:35:01 UTC

Acknowledgments:

Name: the OpenVPN project
Upstream: Guido Vranken

Comment 2 Adam Mariš 2017-09-29 08:35:44 UTC

Created openvpn tracking bugs for this issue:

Affects: epel-all [bug 1497110]
Affects: fedora-all [bug 1497111]

Comment 3 Product Security DevOps Team 2019-06-08 03:26:23 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.