Bug 1621361 (CVE-2018-15909)

Summary: CVE-2018-15909 ghostscript: shading_param incomplete type checking (699660)
Product: [Other] Security Response Reporter: Stefan Cornelius <scorneli>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: abhgupta, ahardin, bleanhar, ccoleman, dbaker, dedgar, jgoulding, jokerman, mchappel, mosvald, security-response-team, sthangav, trankin, twaugh, zdohnal
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: ghostscript 9.24 Doc Type: If docs needed, set a value
Doc Text:
It was discovered that the ghostscript .shfill operator did not properly validate certain types. An attacker could possibly exploit this to bypass the -dSAFER protection and crash ghostscript or, possibly, execute arbitrary code in the ghostscript context via a specially crafted PostScript document.
Story Points: ---
Clone Of: Environment:
Last Closed: 2018-11-28 15:44:00 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: 1621381, 1621384, 1622757, 1622758    
Bug Blocks: 1619570    

Description Stefan Cornelius 2018-08-23 15:24:02 UTC
It was discovered that the ghostscript .shfill operator did not properly validate certain types. A specially crafted PostScript document could exploit this to crash ghostscript or, possibly, execute arbitrary code in the context of the ghostscript process.

Patch:
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=0b6cd1918e1ec4ffd087400a754a845180a4522b

Comment 3 Stefan Cornelius 2018-08-24 13:32:46 UTC
This patch is also required:
http://git.ghostscript.com/?p=ghostpdl.git;h=e01e77a36cbb2e0277bc3a63852244bec41be0f6

Comment 4 Sam Fowler 2018-08-28 00:46:41 UTC
Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1622757]

Comment 7 Cedric Buissart 2018-11-20 10:01:21 UTC
Mitigation:

Please refer to the "Mitigation" section of CVE-2018-16509 : https://access.redhat.com/security/cve/cve-2018-16509

Comment 8 Cedric Buissart 2018-11-20 10:10:47 UTC
Statement:

This issue affects the versions of ghostscript as shipped with Red Hat Enterprise Linux 5, 6, and 7.

Red Hat Enterprise Linux 6 is now in Maintenance Support 2 Phase of the support and maintenance life cycle. This has been rated as having a security impact of Important, and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

Red Hat Enterprise Linux 5 is now in Extended Life Phase of the support and maintenance life cycle. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

Comment 9 errata-xmlrpc 2018-11-27 01:21:18 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3650 https://access.redhat.com/errata/RHSA-2018:3650