Bug 858995 (CVE-2012-4435)

Summary:	CVE-2012-4435 fwknop: fwknopd server did not properly validate allowed IP addresses from malicious authenticated clients
Product:	[Other] Security Response	Reporter:	Jan Lieskovsky <jlieskov>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	mitr, pvrabec
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	fwknop 2.0.3	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-08-22 14:50:17 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:	859006, 859007
Bug Blocks:

Description Jan Lieskovsky 2012-09-20 10:32:52 UTC

An instance of improper validation flaw (leading to fwknopd server crash or missing detection of error condition) has been corrected in upstream 2.0.3 version of fwknop (from upstream Changelog at [1]):
2) [server] Fernando Arnaboldi from IOActive found a condition in which the server did not properly validate allow IP addresses from malicious authenticated clients. This has been fixed with stronger allow IP validation.

References:
[1] http://www.cipherdyne.org/blog/categories/software-releases.html
[2] http://secunia.com/advisories/50522/
[3] http://www.openwall.com/lists/oss-security/2012/09/20/4

Relevant upstream patches:
[4] http://www.cipherdyne.org/cgi-bin/gitweb.cgi?p=fwknop.git;a=commitdiff;h=f4c16bc47fc24a96b63105556b62d61c1ba7d799
[5] http://www.cipherdyne.org/cgi-bin/gitweb.cgi?p=fwknop.git;a=commitdiff;h=263fa01f2af1d336961df320f1c7a9ea84ddac9a

Comment 1 Jan Lieskovsky 2012-09-20 10:35:00 UTC

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

--

This issue did NOT affect the version of the fwknop package, as shipped with Fedora release of 16 (as it is Perl language based implementation yet).

Comment 2 Jan Lieskovsky 2012-09-20 10:57:07 UTC

Created fwknop tracking bugs for this issue

Affects: fedora-rawhide [bug 859006]
Affects: fedora-17 [bug 859007]