Bug 1545232 (CVE-2017-17725)

Summary:	CVE-2017-17725 exiv2: heap-based buffer over-read in Exiv2::getULong function in types.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 reads ICC profiles embedded in a JP2 image. By persuading a victim to open a crafted JP2 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 09:18:29 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:	1545233, 1547130, 1547207
Bug Blocks:	1545252

Description Laura Pardo 2018-02-14 12:48:25 UTC

A flaw was found in Exiv2 0.26. There is an integer wraparound leading to a heap-based buffer over-read in the Exiv2::getULong function in types.cpp, called while parsing an ICC profile. Remote attackers can exploit the vulnerability to cause a denial of service via a crafted JP2 image file.


References:
https://bugzilla.redhat.com/show_bug.cgi?id=1525055
https://github.com/Exiv2/exiv2/issues/188

Patch:
https://github.com/Exiv2/exiv2/pull/193

Comment 1 Laura Pardo 2018-02-14 12:48:56 UTC

Created exiv2 tracking bugs for this issue:

Affects: fedora-all [bug 1545233]

Comment 2 Riccardo Schirone 2018-02-20 09:49:23 UTC

It is important to note that without AddressSanitizer enabled, the out of bound read in Exiv2::getULong does not have impact, since it is at most 4 bytes, however another out of bound read in Jp2Image::readMetadata function is triggered by the same public POC, which could crash the program or leak data.

Comment 5 Riccardo Schirone 2018-02-20 16:26:23 UTC

Statement:

This issue did not affect the versions of Exiv2 as shipped with Red Hat Enterprise Linux 6 and 7 as they did not include support for ICC profiles.

Comment 8 Riccardo Schirone 2018-02-22 09:13:38 UTC

Introduced by:
https://github.com/Exiv2/exiv2/commit/699e1c744e50782e3ed7411cc6ac28260aa169c0