Bug 1797445 (CVE-2019-14492)

Summary:	CVE-2019-14492 opencv: out-of-bounds read in function HaarEvaluator::OptFeature::calc() in cascadedetect.hpp leading to DoS
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	andrew, databases-maint, hhorak, jkucera, jmlich83, jridky, karlthered, kwizart, pkajaba, rakesh.pandit, viktor.vix.jancik
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	opencv 3.4.7, opencv 4.1.1	Doc Type:	If docs needed, set a value
Doc Text:	An out-of-bounds read flaw was found in OpenCV in the way the Cascade Classifier algorithm loaded and processed the Haar feature-based cascade classifiers. This flaw allows a remote attacker to provide a specially crafted classifier in the form of an XML file that, when loaded by an application linked to OpenCV, would crash the application, causing a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-07-28 08:10:15 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:	1797447, 1824135, 1824136
Bug Blocks:	1797452

Description Dhananjay Arunesh 2020-02-03 08:02:23 UTC

An issue was discovered in OpenCV before 3.4.7 and 4.x before 4.1.1. There is an out of bounds read/write in the function HaarEvaluator::OptFeature::calc in modules/objdetect/src/cascadedetect.hpp, which leads to denial of service.

Reference:
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00025.html
https://github.com/opencv/opencv/compare/33b765d...4a7ca5a
https://github.com/opencv/opencv/compare/371bba8...ddbd10c
https://github.com/opencv/opencv/issues/15124

Comment 1 Dhananjay Arunesh 2020-02-03 08:03:43 UTC

Created opencv tracking bugs for this issue:

Affects: fedora-all [bug 1797447]

Comment 2 Mauro Matteo Cascella 2020-04-15 09:12:54 UTC

Upstream fix:
https://github.com/opencv/opencv/commit/321c74ccd6077bdea1d47450ca4fe955cb5b6330

Comment 6 Mauro Matteo Cascella 2020-04-15 15:04:07 UTC

Statement:

The versions of OpenCV as shipped with Red Hat Enterprise Linux 7 and 8 are affected by this flaw. Although it's technically possible that classifiers are loaded from untrusted sources, this is probably an unlikely case in practice.

Comment 7 Mauro Matteo Cascella 2020-04-15 15:04:10 UTC

Mitigation:

Avoid loading cascade classifiers from external untrusted sources.

Comment 8 Nicolas Chauvet (kwizart) 2020-07-28 08:10:15 UTC

Fixed in 3.4.10-1 package in f31