Bug 1366239 (CVE-2016-6328)

Summary:	CVE-2016-6328 libexif: Integer overflow in parsing MNOTE entry data of the input file
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	osoukup, rdieter, rhbugs, rhughes, security-response-team, yselkowi
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-08-22 13:32:03 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1484032
Bug Blocks:	1366243

Description Andrej Nemec 2016-08-11 11:07:25 UTC

A vulnerability was found in libexif. The vulnerability is caused by an integer overflow. In some cases, the integer overflow can cause Heap Out-of-Bounds Read, i.e. Heap Buffer Overflow vulnerability. In some others cases, the integer overflow can cause use of uninitialized pointer variable, i.e. Use of Uninitialized Variable Vulnerability. The vulnerability happens when parsing MNOTE entry data of the input file. The vulnerability can cause Denial-of-Service (DoS) and Information Disclosure (disclosing some critical heap chunk metadata, even other applications’ private data).

Comment 8 Stefan Cornelius 2017-08-22 13:31:06 UTC

Patch:
http://libexif.cvs.sourceforge.net/viewvc/libexif/libexif/libexif/pentax/mnote-pentax-entry.c?r1=1.26&r2=1.27

Comment 9 Stefan Cornelius 2017-08-22 13:31:09 UTC

Statement:

Red Hat Product Security has rated this issue as having Low 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/.

Comment 10 Stefan Cornelius 2017-08-22 13:32:29 UTC

Created libexif tracking bugs for this issue:

Affects: fedora-all [bug 1484032]

Comment 11 Yaakov Selkowitz 2017-12-15 20:52:37 UTC

(In reply to Stefan Cornelius from comment #8)
> Patch:
> http://libexif.cvs.sourceforge.net/viewvc/libexif/libexif/libexif/pentax/
> mnote-pentax-entry.c?r1=1.26&r2=1.27

Or in its new location:

https://github.com/libexif/libexif/commit/41bd04234b104312f54d25822f68738ba8d7133d