Bug 859002 (CVE-2012-4436)

Summary:	CVE-2012-4436 fwknop (client): Buffer overflow by --last command line argument by processing of a specially-crafted ~/.fwknop.run
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:	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:	2021-10-19 21:57:21 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 10:50:24 UTC

A buffer overflow flaw, potentially leading to out-of heap-based buffer bounds write, has been corrected in upstream 2.0.3 version of fwknop (from upstream Changelog at [1]):
4) [client] Fernando Arnaboldi from IOActive found a local buffer overflow in --last processing with a maliciously constructed ~/.fwknop.run file. This has been fixed with proper validation of .fwknop.run arguments.

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 patch:
[4] http://www.cipherdyne.org/cgi-bin/gitweb.cgi?p=fwknop.git;a=commitdiff;h=a60f05ad44e824f6230b22f8976399340cb535dc

Comment 1 Jan Lieskovsky 2012-09-20 10:55:01 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 10:57:51 UTC

Created fwknop tracking bugs for this issue

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