Bug 1894226 (CVE-2020-27752)

Summary:	CVE-2020-27752 ImageMagick: heap-based buffer overflow in PopShortPixel in MagickCore/quantum-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:	medium	Docs Contact:
Priority:	medium
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-private.h. This flaw allows an attacker who submits a crafted file processed by ImageMagick to trigger a heap buffer overflow. The highest threat from this vulnerability is to system availability and also a potential impact on data integrity.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-24 23:34:23 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:	1901247, 1901248, 1910554
Bug Blocks:	1891602

Description Guilherme de Almeida Suckevicz 2020-11-03 18:40:42 UTC

In ImageMagick, there is a heap-buffer-overflow at MagickCore/quantum-private.h:227 in PopShortPixel.

Reference:
https://github.com/ImageMagick/ImageMagick/issues/1752

Upstream patch:
https://github.com/ImageMagick/ImageMagick/commit/a9d563d3d73874312080d30dc4ba07cecad56192

Comment 1 Guilherme de Almeida Suckevicz 2020-11-03 18:40:44 UTC

Acknowledgments:

Name: Suhwan Song (Seoul National University)

Comment 2 Todd Cullum 2020-11-03 22:37:44 UTC

This looks like the fix for CVE-2020-25664 was an incomplete fix hence the second reproducer which triggers the same thing via the same code path after the patch was applied.

Comment 4 Todd Cullum 2020-11-03 22:41:41 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 6 Guilherme de Almeida Suckevicz 2020-11-24 19:11:55 UTC

Created ImageMagick tracking bugs for this issue:

Affects: epel-8 [bug 1901247]
Affects: fedora-all [bug 1901248]

Comment 7 Product Security DevOps Team 2020-11-24 23:34:23 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-2020-27752