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Bug 1619751 - (CVE-2018-15910) CVE-2018-15910 ghostscript: LockDistillerParams type confusion (699656)
CVE-2018-15910 ghostscript: LockDistillerParams type confusion (699656)
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
high Severity high
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Assigned To: Red Hat Product Security
impact=important,public=20180821,repo...
: Security
Depends On: 1621163 1621157 1621160
Blocks: 1619570
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Reported: 2018-08-21 12:10 EDT by Stefan Cornelius
Modified: 2018-10-31 21:32 EDT (History)
14 users (show)

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Doc Text:
It was discovered that the type of the LockDistillerParams parameter is not properly verified. 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.
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:2918 None None None 2018-10-15 22:25 EDT

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Description Stefan Cornelius 2018-08-21 12:10:58 EDT 
It was discovered that the type of the LockDistillerParams parameter is not properly verified. A specially crafted PostScript document could possibly exploit this to crash ghostscript or, possibly, execute arbitrary code in the context of the ghostscript process.
Comment 1 Stefan Cornelius 2018-08-21 12:25:36 EDT 
External References:

http://seclists.org/oss-sec/2018/q3/142
Comment 2 Stefan Cornelius 2018-08-22 06:19:48 EDT 
Mitigation:

Please see https://bugzilla.redhat.com/show_bug.cgi?id=1619748#c3
Comment 5 Stefan Cornelius 2018-08-23 10:26:03 EDT 
Patch:
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=c3476dde
Comment 6 Stefan Cornelius 2018-08-23 11:36:38 EDT 
Acknowledgments:

Name: Tavis Ormandy (Google Project Zero)
Comment 7 Stefan Cornelius 2018-09-19 05:59:37 EDT 
Statement:

This issue affects the versions of ghostscript as shipped with Red Hat Enterprise Linux 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/.
Comment 8 errata-xmlrpc 2018-10-15 22:25:21 EDT 
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
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