Bug 1870165 (CVE-2020-16306)

Summary: CVE-2020-16306 ghostscript: NULL pointer dereference in devices/gdevtsep.c could result in a DoS
Product: [Other] Security Response Reporter: Michael Kaplan <mkaplan>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: akostadi, amasferr, chazlett, deekej, dmayorov, jlledo, mosvald, pantinor, rhel-process-autobot, tsedmik, twaugh, watson-tool-maintainers, 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 20:34:59 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: 1870166, 1871215, 1871216    
Bug Blocks: 1870273    

Description Michael Kaplan 2020-08-19 13:16:44 UTC 
A null pointer dereference vulnerability in devices/gdevtsep.c of Artifex Software GhostScript v9.50 allows a remote attacker to cause a denial of service via a crafted postscript file. This is fixed in v9.51.

References:

http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=aadb53eb834b3def3ef68d78865ff87a68901804
https://bugs.ghostscript.com/show_bug.cgi?id=701821
Comment 1 Michael Kaplan 2020-08-19 13:17:00 UTC 
Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1870166]
Comment 2 Todd Cullum 2020-08-21 15:37:31 UTC 
Flaw summary:

This flaw is caused by failure to return upon error condition in /devices/gdevtsep.c. The tiffsep_print_page() and tiffsep1_print_page() routines both check for an error condition after parsing output file names, get a return code, but fail to actually abort if the error condition is met.
Comment 4 Todd Cullum 2020-08-21 15:52:50 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 20:34:59 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-2020-16306