Bug 1870240 (CVE-2020-16291)

Summary:	CVE-2020-16291 ghostscript: buffer overflow in contrib/gdevdj9.c could result in a DoS
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	amasferr, chazlett, deekej, jlyle, mosvald, twaugh, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	ghostscript 9.51	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-05-18 20:35:31 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:	1870241, 1872478, 1872479
Bug Blocks:	1870273

Description Michael Kaplan 2020-08-19 15:19:08 UTC

A buffer overflow vulnerability in contrib/gdevdj9.c of Artifex Software GhostScript v9.50 allows a remote attacker to cause a denial of service via a crafted PDF file. This is fixed in v9.51.

References:

http://git.ghostscript.com/?p=ghostpdl.git;h=4f73e8b4d578e69a17f452fa60d2130c5faaefd6
https://bugs.ghostscript.com/show_bug.cgi?id=701787

Comment 1 Michael Kaplan 2020-08-19 15:19:26 UTC

Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1870241]

Comment 3 Todd Cullum 2020-08-25 21:03:51 UTC

Flaw summary:

Several issues in /contrib/gdevdj9.c contribute to this flaw which is triggered in mem_true32_fill_rectangle() of /contrib/gdevdj9.c. cdj970_print_page is earlier in the backtrace and is a source of the vulnerability, along with its associated functions as seen in the upstream patch. The sink here is the `dest` pointer when it is passed to memset. It is caused by mishandling of resolutions and can be triggered if an attacker provides a crafted PDF file.

Comment 4 Todd Cullum 2020-08-25 21:08:56 UTC

Mitigation:

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Comment 6 errata-xmlrpc 2021-05-18 15:37:05 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:1852 https://access.redhat.com/errata/RHSA-2021:1852

Comment 7 Product Security DevOps Team 2021-05-18 20:35:31 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-16291