Bug 1642584 (CVE-2018-18073)

Summary:	CVE-2018-18073 ghostscript: Saved execution stacks can leak operator arrays
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:	lnykryn, mosvald, rskvaril, 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:	2018-12-18 08:54:28 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:	1642585, 1642586, 1645516, 1645517
Bug Blocks:	1632473

Description Laura Pardo 2018-10-24 17:54:57 UTC

Artifex Ghostscript allows attackers to bypass a sandbox protection mechanism by leveraging exposure of system operators in the saved execution stack in an error object. 

References:
http://www.openwall.com/lists/oss-security/2018/10/10/12 
https://bugs.chromium.org/p/project-zero/issues/detail?id=1690

Upstream Patch:
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=34cc326eb2c5695833361887fe0b32e8d987741c

Comment 1 Laura Pardo 2018-10-24 17:55:36 UTC

Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1642585]

Comment 7 errata-xmlrpc 2018-12-17 19:58:23 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3834 https://access.redhat.com/errata/RHSA-2018:3834

Comment 8 Cedric Buissart 2018-12-18 08:54:30 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 9 Cedric Buissart 2018-12-18 08:54:32 UTC

Mitigation:

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