REDHAT-BUG-1383940
First published: Wed Oct 12 2016(Updated: )
If you call .sethalftone5 with an empty operand stack, ghostscript crashes. This flaw could be exploitable Upstream bug : - <a class="bz_bug_link bz_status_CLOSED bz_closed bz_public " title="CLOSED WONTFIX - [abrt] ease-0.4-1.fc14: memcpy: Process /usr/bin/ease was killed by signal 11 (SIGSEGV)" href="show_bug.cgi?id=697203">Bug 697203</a> - NULL dereference in .sethalftone5 <a href="http://bugs.ghostscript.com/show_bug.cgi?id=697203">http://bugs.ghostscript.com/show_bug.cgi?id=697203</a> Upstream patch : - <a class="bz_bug_link bz_status_CLOSED bz_closed bz_public " title="CLOSED WONTFIX - [abrt] ease-0.4-1.fc14: memcpy: Process /usr/bin/ease was killed by signal 11 (SIGSEGV)" href="show_bug.cgi?id=697203">Bug 697203</a>: check for sufficient params in .sethalftone5 <a href="http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=f5c7555c303">http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=f5c7555c303</a> Reference : <a href="http://seclists.org/oss-sec/2016/q4/98">http://seclists.org/oss-sec/2016/q4/98</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Artifex Ghostscript |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=697203
- http://bugs.ghostscript.com/show_bug.cgi?id=697203
- http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=f5c7555c303
- http://seclists.org/oss-sec/2016/q4/98
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1383941
- https://rhn.redhat.com/errata/RHSA-2017-0014.html
- https://rhn.redhat.com/errata/RHSA-2017-0013.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1383940
Frequently Asked Questions
What is the severity of REDHAT-BUG-1383940?
The severity of REDHAT-BUG-1383940 is classified as a crash vulnerability.
How do I fix REDHAT-BUG-1383940?
To fix REDHAT-BUG-1383940, ensure that you do not call .sethalftone5 with an empty operand stack.
What is the impact of exploiting REDHAT-BUG-1383940?
Exploiting REDHAT-BUG-1383940 can lead to a crash of the Ghostscript application.
Which software versions are affected by REDHAT-BUG-1383940?
REDHAT-BUG-1383940 affects certain versions of Ghostscript.
Is there a workaround for REDHAT-BUG-1383940?
A possible workaround for REDHAT-BUG-1383940 is to validate the operand stack before executing the command.
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- vendor/ghostscript
- canonical/artifex ghostscript