Bug 1625846 (CVE-2018-16541)

Summary:	CVE-2018-16541 ghostscript: Incorrect free logic in pagedevice replacement (699664)
Product:	[Other] Security Response	Reporter:	Sam Fowler <sfowler>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	twaugh, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	ghostscript 9.24	Doc Type:	If docs needed, set a value
Doc Text:	It was discovered that the ghostscript device cleanup did not properly handle devices replaced with a null device. An attacker could possibly exploit this to bypass the -dSAFER protection and crash ghostscript or, possibly, execute arbitrary code in the ghostscript context via a specially crafted PostScript document.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-12-18 09:14:44 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:	1625847, 1625848, 1654621, 1654622
Bug Blocks:	1619570

Description Sam Fowler 2018-09-06 05:27:22 UTC

In Artifex Ghostscript before 9.24, attackers able to supply crafted PostScript files could use incorrect free logic in pagedevice replacement to crash the interpreter.


External Reference:

https://www.kb.cert.org/vuls/id/332928
https://www.artifex.com/news/ghostscript-security-resolved/


Upstream Bug:

https://bugs.ghostscript.com/show_bug.cgi?id=699664


Upstream Patch:

http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=241d9111

Comment 1 Sam Fowler 2018-09-06 05:27:51 UTC

Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1625847]

Comment 3 Stefan Cornelius 2018-09-19 08:19:52 UTC

Acknowledgments:

Name: Tavis Ormandy (Google Project Zero)

Comment 5 Stefan Cornelius 2018-09-19 08:20:21 UTC

Statement:

This issue affects the versions of ghostscript as shipped with Red Hat Enterprise Linux 5, 6, and 7.

Red Hat Enterprise Linux 5 is now in Extended Life Phase of the support and maintenance life cycle. This issue 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/.

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 10 errata-xmlrpc 2018-12-17 19:58:19 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