Bug 1673304 (CVE-2019-3839)

Summary:	CVE-2019-3839 ghostscript: missing attack vector protections for CVE-2019-6116
Product:	[Other] Security Response	Reporter:	Cedric Buissart <cbuissar>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	deekej, mosvald, security-response-team, twaugh, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	ghostscript 9.50	Doc Type:	If docs needed, set a value
Doc Text:	It was found that some privileged operators remained accessible from various places after the CVE-2019-6116 fix. A specially crafted PostScript file could use this flaw in order to, for example, have access to the file system outside of the constrains imposed by -dSAFER.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-05-07 19:21:08 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:	1673398, 1673399, 1692798, 1693807, 1747956
Bug Blocks:	1673302

Description Cedric Buissart 2019-02-07 10:24:00 UTC

It was found that some additional operators and dictionaries were needed to be hidden in order to prevent other CVE-2019-6116 attacks.

Comment 5 Cedric Buissart 2019-02-15 10:24:11 UTC

Mitigation:

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

Comment 10 Cedric Buissart 2019-05-02 16:15:07 UTC

Additional commit required for CVE-2019-6116 :
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=4ec9ca7  
   + http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=db24f25 to prevent pdf2dsc regression

Comment 11 errata-xmlrpc 2019-05-07 04:18:42 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:0971 https://access.redhat.com/errata/RHSA-2019:0971

Comment 12 errata-xmlrpc 2019-05-07 17:05:09 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:1017 https://access.redhat.com/errata/RHSA-2019:1017

Comment 13 Cedric Buissart 2019-09-02 10:48:38 UTC

Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1747956]

Comment 15 Cedric Buissart 2019-11-18 09:51:07 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/.