Bug 1939160 (CVE-2021-3478)

Summary:	CVE-2021-3478 OpenEXR: Out-of-memory in ScanLineInputFile
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:	cbpilm, jeischma, jridky, kwizart, rdieter, rh-spice-bugs
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	OpenEXR 3.0.0-beta, OpenEXR 2.4.3	Doc Type:	If docs needed, set a value
Doc Text:	There's a flaw in OpenEXR's scanline input file functionality. An attacker able to submit a crafted file to be processed by OpenEXR could consume excessive system memory. The greatest impact of this flaw is to system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-02 23:22:40 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:	1939190, 1944794, 1944795, 1944796, 1944797
Bug Blocks:	1929339, 1944841

Description Michael Kaplan 2021-03-15 17:27:49 UTC

Out-of-memory in openexr_exrcheck_fuzzer

Comment 1 Michael Kaplan 2021-03-15 17:27:54 UTC

External References:

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27409

Comment 2 Michael Kaplan 2021-03-15 17:46:03 UTC

Created OpenEXR tracking bugs for this issue:

Affects: fedora-all [bug 1939190]

Comment 3 Todd Cullum 2021-03-30 16:49:38 UTC

This looks like the upstream patch commit: https://github.com/AcademySoftwareFoundation/openexr/commit/bc88cdb6c97fbf5bc5d11ad8ca55306da931283a

Flaw summary:

In ImfScanLineInputFile.cpp, large lineOffset and bytesPerLine tables could cause OpenEXR to allocate excessive memory, causing an impact to system availability. This was due to _data->linesInBuffer missing in the if check.

Comment 6 Cary Phillips 2021-04-23 01:49:56 UTC

This is fixed in OpenEXR v2.5.4, v2.5.5, and v3.0.1 and beyond.

Comment 7 Cary Phillips 2021-05-25 21:40:49 UTC

This is also fixed in OpenEXR v2.4.3
https://github.com/AcademySoftwareFoundation/openexr/blob/master/CHANGES.md#version-243-may-17-2021