Bug 1457122 (CVE-2017-9023)

Summary:	CVE-2017-9023 strongswan: Incorrect Handling of CHOICE types in ASN.1 parser and x509 plugin
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	avagarwa, code, sspreitz
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	strongswan 5.5.3	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-07-06 09:02:31 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:	1457123, 1457124
Bug Blocks:	1457125

Description Andrej Nemec 2017-05-31 07:44:44 UTC

It was found that ASN.1 CHOICE types are not correctly handled by the ASN.1 parser when parsing X.509 certificates with extensions that use such types. This could lead to infinite looping of the thread parsing a specifically crafted certificate.

External References:

https://www.strongswan.org/blog/2017/05/30/strongswan-vulnerability-(cve-2017-9023).html

Comment 1 Andrej Nemec 2017-05-31 07:45:37 UTC

Created strongswan tracking bugs for this issue:

Affects: epel-all [bug 1457123]
Affects: fedora-all [bug 1457124]

Comment 3 Stefan Cornelius 2017-07-06 09:02:31 UTC

Patches:
https://download.strongswan.org/security/CVE-2017-9023/

Comment 4 Stefan Cornelius 2017-07-06 09:02:40 UTC

Statement:

Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.