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Bug 1621359 - (CVE-2018-16511) CVE-2018-16511 ghostscript: missing type check in type checker (699659)
CVE-2018-16511 ghostscript: missing type check in type checker (699659)
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=20180824,repo...
: Security
Depends On: 1621383 1621385 1628537 1628536
Blocks: 1619570
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Reported: 2018-08-23 11:23 EDT by Stefan Cornelius
Modified: 2018-10-31 21:32 EDT (History)
15 users (show)

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Description Stefan Cornelius 2018-08-23 11:23:30 EDT 
It was discovered that the ghostscript type checker 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=0edd3d6c
Comment 1 Stefan Cornelius 2018-08-23 11:23:33 EDT 
Mitigation:

Please see https://bugzilla.redhat.com/show_bug.cgi?id=1619748#c3
Comment 5 Sam Fowler 2018-09-05 22:55:58 EDT 
Upstream Patch:

http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=0edd3d6c
Comment 7 Tomas Hoger 2018-09-13 07:39:21 EDT 
Upstream bug report (still not public):

https://bugs.ghostscript.com/show_bug.cgi?id=699659

Correct upstream fix is noted in comment 5 rather than comment 0.
Comment 8 Tomas Hoger 2018-09-13 07:41:47 EDT 
This has been public for a while, via both upstream commit and the following upstream annoncement:

https://www.artifex.com/news/ghostscript-security-resolved/
Comment 9 Tomas Hoger 2018-09-13 07:42:50 EDT 
Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1628536]
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