Bug 1891994 (CVE-2020-27751)

Summary:	CVE-2020-27751 ImageMagick: integer overflow in MagickCore/quantum-export.c
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/quantum-export.c. 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 long long` as well as a shift exponent that is too large for 64-bit type. 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 23:34:20 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:	1901243, 1901244, 1910556
Bug Blocks:	1891602

Description Guilherme de Almeida Suckevicz 2020-10-27 20:11:53 UTC

In ImageMagick 7.0.8-68 there are shift exponent 65 is too large for 64-bit type at MagickCore/quantum-export.c and outside the range of representable values of type 'unsigned long long' at MagickCore/quantum-private.h.

Reference:
https://github.com/ImageMagick/ImageMagick/issues/1727

Upstream patch:
https://github.com/ImageMagick/ImageMagick/commit/f60d59cc3a7e3402d403361e0985ffa56f746a82

Comment 1 Todd Cullum 2020-10-29 17:40:41 UTC

Acknowledgments:

Name: Suhwan Song (Seoul National University)

Comment 2 Todd Cullum 2020-10-29 19:20:43 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 3 Guilherme de Almeida Suckevicz 2020-11-24 19:10:03 UTC

Created ImageMagick tracking bugs for this issue:

Affects: epel-8 [bug 1901243]
Affects: fedora-all [bug 1901244]

Comment 4 Product Security DevOps Team 2020-11-24 23:34:20 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-2020-27751