Bug 1829014 (CVE-2020-11758)

Summary:	CVE-2020-11758 OpenEXR: out-of-bounds read in ImfOptimizedPixelReading.h
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	jeischma, jridky, kwizart, manisandro, rdieter, rh-spice-bugs
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	OpenEXR 2.4.1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-01 17:12:18 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:	1829015, 1829016, 1834983, 1834984
Bug Blocks:	1829017

Description Guilherme de Almeida Suckevicz 2020-04-28 17:34:02 UTC

An issue was discovered in OpenEXR before 2.4.1. There is an out-of-bounds read in ImfOptimizedPixelReading.h.

References:
https://bugs.chromium.org/p/project-zero/issues/detail?id=1987
https://github.com/AcademySoftwareFoundation/openexr/blob/master/CHANGES.md#version-241-february-11-2020

Comment 1 Guilherme de Almeida Suckevicz 2020-04-28 17:34:24 UTC

Created OpenEXR tracking bugs for this issue:

Affects: fedora-all [bug 1829016]


Created mingw-OpenEXR tracking bugs for this issue:

Affects: fedora-all [bug 1829015]

Comment 2 Todd Cullum 2020-05-12 00:19:45 UTC

This looks like it may be caused by the same root issue as CVE-2020-11759 - see upstream commit[1]. Note the patch is not in ImfOptimizedPixelReading.h but there's a call to DeepScanLineInputFile::DeepScanLineInputFile() earlier in the call stack which was patched.

1. https://github.com/AcademySoftwareFoundation/openexr/commit/e79d2296496a50826a15c667bf92bdc5a05518b4

Comment 3 Todd Cullum 2020-05-12 00:21:50 UTC

Statement:

The versions of OpenEXR shipped with Red Hat Enterprise Linux 7 and prior are not affected by this vulnerability.

Comment 4 Todd Cullum 2020-05-12 19:49:05 UTC

The patch for this was actually done here: https://github.com/AcademySoftwareFoundation/openexr/pull/643/commits/8b97a010d2f74f5125e8608c67c638db059c7cbd