Bug 1870242 (CVE-2020-16287)

Summary:	CVE-2020-16287 ghostscript: buffer overflow in lprn_is_black() in contrib/lips4/gdevlprn.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 20:35:34 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:	1870243, 1872481, 1872482
Bug Blocks:	1870273

Description Michael Kaplan 2020-08-19 15:20:57 UTC

A buffer overflow vulnerability in lprn_is_black() in contrib/lips4/gdevlprn.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=701785
https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=450da26a76286a8342ec0864b3d113856709f8f6

Comment 1 Michael Kaplan 2020-08-19 15:21:17 UTC

Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1870243]

Comment 3 Todd Cullum 2020-08-25 21:17:24 UTC

Flaw summary:

In the routine lprn_is_black() of /contrib/lips4/gdevlprn.c, there is a potential incorrect calculation of offset in a for loop which can lead to an out-of-bounds read if a crafted PDF file is supplied to ghostscript by an attacker. See upstream patch: https://git.ghostscript.com/?p=ghostpdl.git;a=blobdiff;f=contrib/lips4/gdevlprn.c;h=7461e46e4618457153f6742ce7e0fca75ebfa22f;hp=df8f862e21202d4607e82e94b8751e7631cfac85;hb=450da26a76286a8342ec0864b3d113856709f8f6;hpb=93cb0c0adbd9bcfefd021d59c472388f67d3300d

Comment 4 Todd Cullum 2020-08-25 21:17:57 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 7 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 8 Product Security DevOps Team 2021-05-18 20:35:34 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-2020-16287

Comment 9 Red Hat Bugzilla 2023-09-15 00:46:36 UTC

The needinfo request[s] on this closed bug have been removed as they have been unresolved for 500 days