Bug 1929320 (CVE-2020-16587)

Summary:	CVE-2020-16587 OpenEXR: A heap-based buffer overflow in chunkOffsetReconstruction in ImfMultiPartInputFile.cpp could result in a DOS via a crafted EXR file
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
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 2.4.0	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-02 23:07:11 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:	1929321, 1929324, 1930949, 1930950, 1930951
Bug Blocks:	1929327

Description Michael Kaplan 2021-02-16 16:39:09 UTC

A heap-based buffer overflow vulnerability exists in Academy Software Foundation OpenEXR 2.3.0 in chunkOffsetReconstruction in ImfMultiPartInputFile.cpp that can cause a denial of service via a crafted EXR file.

Comment 1 Michael Kaplan 2021-02-16 16:39:13 UTC

External References:

https://github.com/AcademySoftwareFoundation/openexr/commit/8b5370c688a7362673c3a5256d93695617a4cd9a

Comment 2 Michael Kaplan 2021-02-16 16:40:16 UTC

Created OpenEXR tracking bugs for this issue:

Affects: fedora-all [bug 1929321]

Comment 5 Todd Cullum 2021-02-19 21:05:05 UTC

Statement:

This flaw is out of support scope for OpenEXR as shipped with Red Hat Enterprise Linux 6 and 7. For more information on Red Hat Enterprise Linux support scope, please see https://access.redhat.com/support/policy/updates/errata/ .

Comment 6 Todd Cullum 2021-02-24 17:54:05 UTC

Flaw summary:

MultiPartInputFile::Data::chunkOffsetReconstruction() in OpenEXR/IlmImf/ImfMultiPartInputFile.cpp has an off-by-one error allowing an invalid index to be used when restructuring the chunk offset table. This could cause an out-of-bounds read.

Upstream patch: https://github.com/AcademySoftwareFoundation/openexr/commit/8b5370c688a7362673c3a5256d93695617a4cd9a