Bug 1870159 (CVE-2020-16310)

Summary:	CVE-2020-16310 ghostscript: division by zero in dot24_print_page() in devices/gdevdm24.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, 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 20:34:53 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:	1870160, 1870835, 1870836
Bug Blocks:	1870273

Description Michael Kaplan 2020-08-19 13:05:22 UTC

A division by zero vulnerability in dot24_print_page() in devices/gdevdm24.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:

https://bugs.ghostscript.com/show_bug.cgi?id=701828
https://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=eaba1d97b62831b42c51840cc8ee2bc4576c942e

Comment 1 Michael Kaplan 2020-08-19 13:06:09 UTC

Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1870160]

Comment 4 Todd Cullum 2020-08-21 14:37:24 UTC

Flaw summary:

In dot24_print_page(), bytes_per_space is a divisor that can be set to 0 when processing very low resolutions, causing a divide-by-zero condition which can result in denial of service when handling a specially crafted input file.

Comment 5 errata-xmlrpc 2021-05-18 15:36:38 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 6 Product Security DevOps Team 2021-05-18 20:34:53 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-2020-16310