Bug 1870167 (CVE-2020-16301)

Summary:	CVE-2020-16301 ghostscript: buffer overflow in okiibm_print_page1() in devices/gdevokii.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 20:35:02 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:	1870168, 1884651
Bug Blocks:	1870273

Description Michael Kaplan 2020-08-19 13:20:16 UTC

A buffer overflow vulnerability in okiibm_print_page1() in devices/gdevokii.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.

Reference:

https://bugs.ghostscript.com/show_bug.cgi?id=701808
https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=f54414c8b15b2c27d1dcadd92cfe84f6d15f18dc

Comment 1 Michael Kaplan 2020-08-19 13:20:32 UTC

Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1870168]

Comment 2 Todd Cullum 2020-08-21 17:25:14 UTC

Flaw Summary:

In /devices/gdevokii.c's okiibm_print_page1() routine, there's a buffer access graphics_modes_9[x_dpi / 60], which can go out-of-bounds of the global variable with certain x_dpi values that correspond to input pixels per inch. The patch for this flaw ensures that if a value would go out-of-bounds, an error is returned instead. This flaw is triggered by a crafted input PDF file.

Comment 4 Todd Cullum 2020-08-21 17:31:14 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 15:36:45 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 20:35:02 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-2020-16301