Bug 892685 (CVE-2012-6086)

Summary:	CVE-2012-6086 zabbix: Improper use of cURL API might lead to improper SSL certificate verification (MiTM)
Product:	[Other] Security Response	Reporter:	Jan Lieskovsky <jlieskov>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	brett.lentz, dan, nelsonab, volker27
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-10-08 20:37:48 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:	892687, 892688, 892763, 893414
Bug Blocks:	767033

Description Jan Lieskovsky 2013-01-07 15:38:52 UTC

A security flaw was found in the way Zabbix, an open-source monitoring solution for IT infrastructure, used (lib)cURL's CURLOPT_SSL_VERIFYHOST variable, when doing certificate validation (value of '1' meaning only check for the existence of a common name was used instead of value '2' - which also checks if the particular common name matches the requested hostname of the server). A rogue service could use this flaw to conduct man-in-the-middle (MiTM) attacks.

Upstream bug report:
[1] https://support.zabbix.com/browse/ZBX-5924

References:
[2] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=697443
[3] http://www.openwall.com/lists/oss-security/2013/01/02/1
[4] http://www.openwall.com/lists/oss-security/2013/01/03/1

Comment 1 Jan Lieskovsky 2013-01-07 15:44:47 UTC

This issue affects the versions of the zabbix package, as shipped with Fedora release of 16 and 17. Please schedule an update.

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This issue affects the version of the zabbix package, as shipped with Fedora EPEL 6. Please schedule an update.

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This issue does not affect the version of the zabbix package, as shipped with Fedora EPEL 5 (looks certificate verification is not supported yet in v.1.4.7 version, currently shipped with Fedora EPEL 5).

Comment 2 Jan Lieskovsky 2013-01-07 15:45:38 UTC

Created zabbix tracking bugs for this issue

Affects: fedora-all [bug 892687]
Affects: epel-6 [bug 892688]

Comment 5 Volker Fröhlich 2013-01-07 19:05:37 UTC

There's a zabbix20 package in EPEL 6 as well.

Comment 6 Jan Lieskovsky 2013-01-09 10:28:28 UTC

(In reply to comment #5)
> There's a zabbix20 package in EPEL 6 as well.

Thank you for pointing out, Volker. Checking that one yet then.

Comment 7 Jan Lieskovsky 2013-01-09 10:35:04 UTC

This issue affects the version of the zabbix20 package, as shipped with Fedora EPEL 6. Please schedule an update (once there is final upstream patch available).

Comment 8 Jan Lieskovsky 2013-01-09 10:36:00 UTC

Created zabbix20 tracking bugs for this issue

Affects: epel-6 [bug 893414]

Comment 10 Vincent Danen 2013-10-08 20:37:48 UTC

This has already been corrected in Fedora and EPEL.