Bug 1891605 (CVE-2020-25664)

Summary:	CVE-2020-25664 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 7.0.8-68, ImageMagick 6.9.10-68	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in ImageMagick. A specially crafted image could cause an out-of-bounds memory write leading to a crash. The highest threat from this vulnerability is to system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-24 23:33:56 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:	1901225, 1901226, 1910565
Bug Blocks:	1891602

Description Guilherme de Almeida Suckevicz 2020-10-26 19:48:51 UTC

In ImageMagick, there is a heap-buffer-overflow at MagickCore/quantum-private.h:227:12 in PopShortPixel.

Reference:
https://github.com/ImageMagick/ImageMagick/issues/1716

Upstream patch:
https://github.com/ImageMagick/ImageMagick/commit/1f450bb5ba53d275de6d1cd086c98a0b549ad393

Comment 1 Todd Cullum 2020-10-28 20:40:05 UTC

Flaw summary:

In WriteOnePNGImage() of the PNG coder at coders/png.c, an improper call to AcquireVirtualMemory() and memset() allows for an out-of-bounds write later when PopShortPixel() from MagickCore/quantum-private.h is called. The patch fixes the calls by adding 256 to rowbytes. An attacker who is able to supply a specially crafted image could affect availability with a low impact to data integrity.

Comment 2 Todd Cullum 2020-10-28 21:13:09 UTC

Acknowledgments:

Name: Suhwan Song (Seoul National University)

Comment 3 Todd Cullum 2020-10-29 19:10:26 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 18:57:40 UTC

Created ImageMagick tracking bugs for this issue:

Affects: epel-8 [bug 1901225]
Affects: fedora-all [bug 1901226]

Comment 5 Product Security DevOps Team 2020-11-24 23:33:56 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-2020-25664