Bug 1728486 (CVE-2019-13110)

Summary:	CVE-2019-13110 exiv2: integer-overflow and out-of-bounds read in CiffDirectory::readDirectory leads to denail of service
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	jgrulich, michel, rdieter, rschiron
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	exiv 0.27.2	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-27 10:46:04 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:	1728487, 1730404
Bug Blocks:	1728496, 1988983

Description Dhananjay Arunesh 2019-07-10 05:09:02 UTC

A CiffDirectory::readDirectory integer overflow and out-of-bounds read in Exiv2 through 0.27.1 allows an attacker to cause a denial of service (SIGSEGV) via a crafted CRW image file.

Reference:
https://github.com/Exiv2/exiv2/issues/843
https://github.com/Exiv2/exiv2/pull/844

Comment 1 Dhananjay Arunesh 2019-07-10 05:10:20 UTC

Created exiv2 tracking bugs for this issue:

Affects: fedora-all [bug 1728487]

Comment 3 Riccardo Schirone 2019-07-16 15:29:17 UTC

Upstream patches:
https://github.com/Exiv2/exiv2/commit/9628f82084ed30d494ddd4f7360d233801e22967 [master branch]
https://github.com/Exiv2/exiv2/commit/c0ecc2ae36f34462be98623deb85ba1747ae2175 [0.27-maintenance branch]

Comment 5 Riccardo Schirone 2019-07-16 15:42:39 UTC

Statement:

This issue did not affect the versions of exiv2 as shipped with Red Hat Enterprise Linux 8 as they did not include the vulnerable code.

Comment 6 Riccardo Schirone 2019-07-16 15:47:36 UTC

Function CiffDirectory::readDirectory() in crwimage.cpp checks whether the value `o` read from the image is valid, however the check is performed as `if (o + 2 > size)`, which could be bypassed when `o + 2` wraps around. This leads to an out-of-bound read when reading the `count` value.

Comment 8 Todd Cullum 2021-08-03 00:45:00 UTC

*** Bug 1988977 has been marked as a duplicate of this bug. ***