Bug 1545232 – CVE-2017-17725 exiv2: heap-based buffer over-read in Exiv2::getULong function in types.cpp

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Bug 1545232 - (CVE-2017-17725) CVE-2017-17725 exiv2: heap-based buffer over-read in Exiv2::getULong function in types.cpp

Summary:	CVE-2017-17725 exiv2: heap-based buffer over-read in Exiv2::getULong function...

Status:	CLOSED NOTABUG

Aliases:	CVE-2017-17725

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
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URL:
Whiteboard:	impact=low,public=20171212,reported=2...
Keywords:	Security

Depends On:	1545233 1547130 1547207
Blocks:	1545252
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Reported:	2018-02-14 07:48 EST by Laura Pardo
Modified:	2018-03-14 05:18 EDT (History)
CC List:	5 users (show)

See Also:
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.
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Last Closed:	2018-03-14 05:18:29 EDT
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Description Laura Pardo 2018-02-14 07:48:25 EST

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 07:48:56 EST

Created exiv2 tracking bugs for this issue:

Affects: fedora-all [bug 1545233]

Comment 2 Riccardo Schirone 2018-02-20 04:49:23 EST

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 11:26:23 EST

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 04:13:38 EST

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

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