Bug 1383940 (CVE-2016-8602)

Summary:	CVE-2016-8602 ghostscript: check for sufficient params in .sethalftone5
Product:	[Other] Security Response	Reporter:	Cedric Buissart <cbuissar>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abhgupta, anemec, deekej, dmcphers, jialiu, jokerman, kseifried, lmeyer, mmccomas, sardella, tiwillia, twaugh, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	It was found that ghostscript did not sufficiently check the validity of parameters given to the .sethalftone5 function. A specially crafted postscript document could cause a crash, or execute arbitrary code in the context of the gs process.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-01-04 11:11:17 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:	1383941, 1390299, 1390300, 1390301, 1390302
Bug Blocks:	1380329

Description Cedric Buissart 2016-10-12 08:18:13 UTC

If you call .sethalftone5 with an empty operand stack, ghostscript crashes. This flaw could be exploitable

Upstream bug :
 - Bug 697203 - NULL dereference in .sethalftone5
http://bugs.ghostscript.com/show_bug.cgi?id=697203

Upstream patch :
 - Bug 697203: check for sufficient params in .sethalftone5
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=f5c7555c303

Reference :
http://seclists.org/oss-sec/2016/q4/98

Comment 1 Cedric Buissart 2016-10-12 08:19:06 UTC

Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1383941]

Comment 7 errata-xmlrpc 2017-01-04 10:10:40 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2017:0014 https://rhn.redhat.com/errata/RHSA-2017-0014.html

Comment 8 errata-xmlrpc 2017-01-04 10:11:57 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:0013 https://rhn.redhat.com/errata/RHSA-2017-0013.html