Bug 1621363 (CVE-2018-16542) - CVE-2018-16542 ghostscript: .definemodifiedfont memory corruption if /typecheck is handled (699668)
Summary: CVE-2018-16542 ghostscript: .definemodifiedfont memory corruption if /typeche...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-16542
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1621380 1621382 1625827 1625828
Blocks: 1619570
TreeView+ depends on / blocked
 
Reported: 2018-08-23 15:24 UTC by Stefan Cornelius
Modified: 2021-12-10 17:07 UTC (History)
4 users (show)

Fixed In Version: ghostscript 9.24
Doc Type: If docs needed, set a value
Doc Text:
It was discovered that ghostscript did not properly handle certain stack overflow error conditions. 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.
Clone Of:
Environment:
Last Closed: 2018-11-20 10:33:01 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:2918 0 None None None 2018-10-16 02:25:41 UTC

Description Stefan Cornelius 2018-08-23 15:24:15 UTC 
It was discovered that ghostscript did not properly handle certain stack overflow error conditions. 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=commitdiff;h=b575e1ec42
Comment 3 Sam Fowler 2018-09-06 04:44:57 UTC 
Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1625827]
Comment 6 Stefan Cornelius 2018-09-19 08:23:20 UTC 
Acknowledgments:

Name: Tavis Ormandy (Google Project Zero)
Comment 7 errata-xmlrpc 2018-10-16 02:25:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:2918 https://access.redhat.com/errata/RHSA-2018:2918
Comment 8 Cedric Buissart 2018-11-20 10:32:22 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 Cedric Buissart 2018-11-20 10:33:09 UTC 
Mitigation:

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