Bug 801896 (CVE-2012-1176)

Summary:	CVE-2012-1176 pyfribidi: buffer overflow when handling 4-byte utf-8 sequences
Product:	[Other] Security Response	Reporter:	Vincent Danen <vdanen>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	gwync, hdegoede
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:	2015-08-22 15:09:03 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	801897
Bug Blocks:

Description Vincent Danen 2012-03-09 19:06:06 UTC

A buffer overflow flaw was reported [1].[2] in pyfribidi's fribidi_utf8_to_unicode() function, due to it handling at most 3 bytes for a single unicode character.  If a 4-byte utf-8 sequence was supplied, it would generate 2 unicode characters which would overflow the logical buffer.  This has been fixed in pyfribidi 0.11 [3].

[1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=663189
[2] https://github.com/pediapress/pyfribidi/issues/2
[3] https://github.com/pediapress/pyfribidi/commit/d2860c655357975e7b32d84e6b45e98f0dcecd7a

Comment 1 Vincent Danen 2012-03-09 19:06:46 UTC

Created pyfribidi tracking bugs for this issue

Affects: fedora-all [bug 801897]

Comment 2 Vincent Danen 2012-03-14 18:12:19 UTC

This was assigned the name CVE-2012-1176:

http://www.openwall.com/lists/oss-security/2012/03/14/9