Bug 1652893 (CVE-2018-16863) - CVE-2018-16863 ghostscript: incomplete fix for CVE-2018-16509
Summary: CVE-2018-16863 ghostscript: incomplete fix for CVE-2018-16509
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-16863
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: 1652901 1652902
Blocks: 1652892
TreeView+ depends on / blocked
 
Reported: 2018-11-23 12:20 UTC by Cedric Buissart
Modified: 2021-02-16 22:44 UTC (History)
3 users (show)

Fixed In Version:
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It was found that RHSA-2018:2918 did not fully fix CVE-2018-16509. An attacker could possibly exploit another variant of the flaw and bypass the -dSAFER protection to, for example, execute arbitrary shell commands via a specially crafted PostScript document.
Clone Of:
Environment:
Last Closed: 2018-12-04 15:04:38 UTC
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:3761 0 None None None 2018-12-03 23:52:55 UTC

Description Cedric Buissart 2018-11-23 12:20:50 UTC 
It was found that the fix for CVE-2018-16509 provided in Red Hat Enterprise Linux 7 was not sufficient.
Comment 10 Cedric Buissart 2018-12-03 14:56:04 UTC 
The full fix for CVE-2018-16509 (bug 1619748) consists of the following 4 upstream patches:
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=5516c614dc33
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=78911a01b67d
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=79cccf641486
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=520bb0ea7519


The RHSA-2018:2918 erratum for Red Hat Enterprise Linux 7 only included the first 2 fixes, and hence failed to fix CVE-2018-16509 completely.
Comment 11 errata-xmlrpc 2018-12-03 23:52:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3761 https://access.redhat.com/errata/RHSA-2018:3761
Comment 12 Cedric Buissart 2019-08-14 07:03:16 UTC 
Statement:

This vulnerability affects only Red Hat Enterprise Linux version 7. Red Hat Enterprise Linux version 6 is not affected by this vulnerability because the set of fixes for CVE-2018-16509, released via  RHSA-2018:3760, was complete.
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