Bug 1652893 (CVE-2018-16863)

Summary:	CVE-2018-16863 ghostscript: incomplete fix for CVE-2018-16509
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:	cperry, mosvald, security-response-team
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 RHSA-2018:2918 did not fully fix CVE-2018-16509. An attacker could possibly exploit another variant of the flaw and bypass the -dSAFER protection to, for example, execute arbitrary shell commands via a specially crafted PostScript document.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-12-04 15:04:38 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:	1652901, 1652902
Bug Blocks:	1652892

Description Cedric Buissart 2018-11-23 12:20:50 UTC

It was found that the fix for CVE-2018-16509 provided in Red Hat Enterprise Linux 7 was not sufficient.

Comment 10 Cedric Buissart 2018-12-03 14:56:04 UTC

The full fix for CVE-2018-16509 (bug 1619748) consists of the following 4 upstream patches:
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=5516c614dc33
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=78911a01b67d
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=79cccf641486
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=520bb0ea7519


The RHSA-2018:2918 erratum for Red Hat Enterprise Linux 7 only included the first 2 fixes, and hence failed to fix CVE-2018-16509 completely.

Comment 11 errata-xmlrpc 2018-12-03 23:52:50 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3761 https://access.redhat.com/errata/RHSA-2018:3761

Comment 12 Cedric Buissart 2019-08-14 07:03:16 UTC

Statement:

This vulnerability affects only Red Hat Enterprise Linux version 7. Red Hat Enterprise Linux version 6 is not affected by this vulnerability because the set of fixes for CVE-2018-16509, released via  RHSA-2018:3760, was complete.