Bug 1383223 (CVE-2016-7996, CVE-2016-7997)

Summary:	CVE-2016-7996 CVE-2016-7997 GraphicsMagick: WPG Reader Issues
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	andreas, rdieter
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:	2019-06-08 02:59:52 UTC	Type:	---
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Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1383225, 1383226
Bug Blocks:

Description Andrej Nemec 2016-10-10 08:50:09 UTC

Two security issues have been discovered in the WPG format reader in
GraphicsMagick 1.3.25 (and earlier):

1. CVE-2016-7996
   In a build with QuantumDepth=8 (the default), there is no check
   that the provided colormap is not larger than 256 entries,
   resulting in potential heap overflow.  This problem does not occur
   with larger QuantumDepth values.

2. CVE-2016-7997
   The assertion:

   ReferenceBlob: Assertion `blob != (BlobInfo *) NULL' failed.

   is thrown (causing a crash) for some files due to a logic error
   which leads to passing a NULL pointer where a NULL pointer is not
   allowed.

References (patch attached):

http://seclists.org/oss-sec/2016/q4/55

Comment 1 Andrej Nemec 2016-10-10 08:51:18 UTC

Created GraphicsMagick tracking bugs for this issue:

Affects: fedora-all [bug 1383225]
Affects: epel-all [bug 1383226]

Comment 2 Rex Dieter 2017-03-02 14:31:11 UTC

Fwiw, only el6's GraphicsMagick doesn't use --with-quantum-depth=16 build option, so I'm guessing that's the only one vulnerable here.

Comment 3 Rex Dieter 2017-03-02 14:50:12 UTC

Sorry, that's (apparently) only issue 1.  I'll pull in both fixes

Comment 4 Product Security DevOps Team 2019-06-08 02:59:52 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.