Bug 1950855

Summary:	ImageMagick: division by zero vulnerability in XFontBrowserWidget() in MagickCore/widget.c
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	fedora, jhorak, mike, pahan
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-04-23 14:19:25 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:	1950856, 1950858
Bug Blocks:	1945062

Description Dhananjay Arunesh 2021-04-19 03:06:20 UTC

A division-by-zero exception was found in ImageMagick in MagickCore/widget.c: XFontBrowserWidget(). It most likely will lead to a DoS attack affecting servers' availability, but could also cause other problems related to undefined behavior. This bug affects ImageMagick versions prior to 7.0.11-2 (included).

Reference:
https://github.com/ImageMagick/ImageMagick/issues/3335

Upstream patch:
https://github.com/ImageMagick/ImageMagick/commit/528d66d6dc6a7aff7c5fb313b3217399e5c8081a
https://github.com/ImageMagick/ImageMagick6/commit/ad492c7ed4cf1cf285a7f6e2ee5a1e7cf24e73b2

Comment 1 Dhananjay Arunesh 2021-04-19 03:06:49 UTC

Created ImageMagick tracking bugs for this issue:

Affects: epel-8 [bug 1950858]
Affects: fedora-all [bug 1950856]

Comment 2 gkamathe 2021-04-23 14:19:02 UTC

Statement:

Red Hat does not consider a division-by-zero in ImageMagick to be a security flaw