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Bug 1382305 - (CVE-2016-7979) CVE-2016-7979 ghostscript: Type confusion in .initialize_dsc_parser allows remote code execution
CVE-2016-7979 ghostscript: Type confusion in .initialize_dsc_parser allows re...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20161004,repor...
: Security
Depends On: 1390299 1390300 1390301 1390302 1390489
Blocks: 1380329
  Show dependency tree / graph
 
Reported: 2016-10-06 05:52 EDT by Cedric Buissart
Modified: 2017-01-04 06:10 EST (History)
12 users (show)

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Doc Text:
It was found that the ghostscript function .initialize_dsc_parser did not validate its parameter before using it, allowing a type confusion flaw. A specially crafted postscript document could cause a crash code execution in the context of the gs process.
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Clone Of:
Environment:
Last Closed: 2017-01-04 06:10:58 EST
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CRM:
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:0013 normal SHIPPED_LIVE Moderate: ghostscript security update 2017-01-04 10:09:56 EST
Red Hat Product Errata RHSA-2017:0014 normal SHIPPED_LIVE Moderate: ghostscript security update 2017-01-04 10:09:47 EST

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Description Cedric Buissart 2016-10-06 05:52:08 EDT 
.initialize_dsc_parser doesn't validate the parameter is a dict type before using it.

This is a security issue, because it can be abused to escape the -dSAFER sandbox.

This allows a Denial of Service, arbitrary code execution.

Upstream bug :
 - Bug 697190 - .initialize_dsc_parser doesn't validate the parameter is a dict type before using it.
http://bugs.ghostscript.com/show_bug.cgi?id=697190

Upstream patch :
 - DSC parser - validate parameters
http://git.ghostscript.com/?p=ghostpdl.git;h=875a0095f37626a721c7ff57d606a0f95af03913

Reference :
http://seclists.org/oss-sec/2016/q4/37
Comment 7 Cedric Buissart 2016-11-01 04:43:06 EDT 
Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1390489]
Comment 9 errata-xmlrpc 2017-01-04 05:10:30 EST 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2017:0014 https://rhn.redhat.com/errata/RHSA-2017-0014.html
Comment 10 errata-xmlrpc 2017-01-04 05:11:49 EST 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:0013 https://rhn.redhat.com/errata/RHSA-2017-0013.html
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