Bug 1898295 (CVE-2020-27773)

Summary:	CVE-2020-27773 ImageMagick: division by zero at MagickCore/gem-private.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:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	fedora, jhorak, mike, pahan, rhel8-maint, security-response-team, stransky
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	ImageMagick 7.0.9-0	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in ImageMagick in MagickCore/gem-private.h. An attacker who submits a crafted file that is processed by ImageMagick could trigger undefined behavior in the form of values outside the range of type `unsigned char` or division by zero. This would most likely lead to an impact to application availability, but could potentially cause other problems related to undefined behavior.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-24 23:35:26 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:	1901291, 1901292, 1910529
Bug Blocks:	1891602

Description Guilherme de Almeida Suckevicz 2020-11-16 18:36:59 UTC

In ImageMagick, there is a division by zero at MagickCore/gem-private.h and an outside the range of representable values of type 'unsigned char' at MagickCore/quantum.h.

Reference:
https://github.com/ImageMagick/ImageMagick/issues/1739

Upstream patch:
https://github.com/ImageMagick/ImageMagick/commit/3d71aa8265ffaaf686021a6fbd54c037f71ee3a2

Comment 1 Guilherme de Almeida Suckevicz 2020-11-16 18:37:02 UTC

Acknowledgments:

Name: Suhwan Song (Seoul National University)

Comment 2 Todd Cullum 2020-11-16 20:56:49 UTC

Red Hat Product Security marked this as Low severity because although it could potentially lead to an impact to application availability, no specific impact was demonstrated in this case.

Comment 3 Todd Cullum 2020-11-16 20:57:53 UTC

Statement:

This flaw is out of support scope for Red Hat Enterprise Linux 5, 6, and 7. Inkscape is not affected because it no longer uses a bundled ImageMagick in Red Hat Enterprise Linux 8. For more information regarding support scopes, please see https://access.redhat.com/support/policy/updates/errata .

Comment 4 Guilherme de Almeida Suckevicz 2020-11-24 19:30:10 UTC

Created ImageMagick tracking bugs for this issue:

Affects: epel-8 [bug 1901291]
Affects: fedora-all [bug 1901292]

Comment 5 Product Security DevOps Team 2020-11-24 23:35:26 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-27773