Bug 1654464 (CVE-2018-19476)

Summary:	CVE-2018-19476 ghostscript: access bypass in psi/zicc.c (700169)
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	cbuissar, deekej, mosvald, twaugh, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	ghostscript 9.26	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-02-01 14:02:16 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:	1654465, 1660828, 1660829, 1660830
Bug Blocks:	1654472

Description Laura Pardo 2018-11-28 20:44:52 UTC

A vulnerability was found in Artifex Ghostscript before 9.26. A type confusion in setcolorspace in psi/zicc.c allows remote attackers to bypass intended access restrictions. 


References:
https://bugs.ghostscript.com/show_bug.cgi?id=700169 
https://www.ghostscript.com/doc/9.26/History9.htm#Version9.26

Upstream Patches:
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=67d760ab775dae4efe803b5944b0439aa3c0b04a 
http://git.ghostscript.com/?p=ghostpdl.git;h=548bb434e81dadcc9f71adf891a3ef5bea8e2b4e

Comment 1 Laura Pardo 2018-11-28 20:46:09 UTC

Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1654465]

Comment 2 Cedric Buissart 2018-12-05 12:38:03 UTC

Mitigation:

Please refer to the "Mitigation" section of CVE-2018-16509 : https://access.redhat.com/security/cve/cve-2018-16509

Comment 4 Cedric Buissart 2018-12-19 10:30:47 UTC

Note: 
Adding additional patch, from https://bugs.ghostscript.com/show_bug.cgi?id=700169#c1, to protect other type confusions :

Upstream Patches:
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=67d760ab775dae4efe803b5944b0439aa3c0b04a 
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=548bb434e81dadcc9f71adf891a3ef5bea8e2b4e

Comment 5 Cedric Buissart 2018-12-19 10:37:38 UTC

Statement:

Red Hat Enterprise Linux 6 is now in Maintenance Support 2 Phase of the support and maintenance life cycle. This has been rated as having a security impact of Important, and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

Comment 7 errata-xmlrpc 2019-01-31 18:19:36 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:0229 https://access.redhat.com/errata/RHSA-2019:0229