Bug 1545249 (CVE-2017-17723)

Summary:	CVE-2017-17723 exiv2: heap-based buffer over-read in Exiv2::Image::byteSwap4 in image.cpp
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	jgrulich, mcepl, michel, rdieter, rschiron
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	An integer wraparound, leading to heap-based out-of-bound read, was found in the way Exiv2 library prints Image File Directory(IFD) in TIFF images. By persuading a victim to open a crafted TIFF image, a remote attacker could crash the application or possibly retrieve a portion of memory.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-03-14 09:18:20 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:	1545250, 1547488, 1547489
Bug Blocks:	1545252

Description Laura Pardo 2018-02-14 13:25:18 UTC

A flaw was found in Exiv2 0.26, there is a integer wraparound in the
Exiv2::Image::printIFDStructure function, leading to a heap-based buffer
over-read in the Exiv2::Image::byteSwap4 function in image.cpp. Remote
attackers can exploit this vulnerability to disclose memory data or cause a
denial of service via a crafted TIFF file.


References:
https://bugzilla.redhat.com/show_bug.cgi?id=1524104
https://github.com/Exiv2/exiv2/issues/229

Comment 1 Laura Pardo 2018-02-14 13:25:41 UTC

Created exiv2 tracking bugs for this issue:

Affects: fedora-all [bug 1545250]

Comment 2 Riccardo Schirone 2018-02-21 12:18:28 UTC

Patches:

https://github.com/Exiv2/exiv2/commit/6e3855aed7ba8bb4731fc4087ca7f9078b2f3d97
https://github.com/Exiv2/exiv2/commit/74cb5bab132ed76adf15df172c5e8b58cddaa96c

Comment 6 Riccardo Schirone 2018-02-21 12:58:31 UTC

Statement:

This issue did not affect the versions of Exiv2 as shipped with Red Hat Enterprise Linux 6 and 7.