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Bug 1334188 - (CVE-2016-5239) CVE-2016-5239 ImageMagick,GraphicsMagick: Gnuplot delegate vulnerability allowing command injection
CVE-2016-5239 ImageMagick,GraphicsMagick: Gnuplot delegate vulnerability allo...
Status: NEW
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=20160508,repor...
: Security
Depends On: 1341777 1341778 1341779 1341780
Blocks: 1333419 1334189
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Reported: 2016-05-09 02:53 EDT by Adam Mariš
Modified: 2017-03-17 05:53 EDT (History)
6 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
It was discovered that ImageMagick did not properly sanitize certain input before passing it to the gnuplot delegate functionality. A remote attacker could create a specially crafted image that, when processed by an application using ImageMagick or an unsuspecting user using the ImageMagick utilities, would lead to arbitrary execution of shell commands with the privileges of the user running the application.
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:1237 normal SHIPPED_LIVE Important: ImageMagick security update 2016-07-18 13:06:55 EDT

  None (edit)
Description Adam Mariš 2016-05-09 02:53:22 EDT 
It was found that gnuplot delegate functionality in ImageMagick and GraphicsMagick allows system command injection while interpreting gnuplot files.

Upstream patch (ImageMagick):

http://git.imagemagick.org/repos/ImageMagick/commit/70a2cf326ed32bedee144b961005

Upstream patch (GraphicsMagick):

http://hg.code.sf.net/p/graphicsmagick/code/rev/45998a25992d
Comment 2 Adam Mariš 2016-05-23 10:08:15 EDT 
Public via:

http://www.openwall.com/lists/oss-security/2016/05/09/1
Comment 4 errata-xmlrpc 2016-06-16 18:48:02 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6
  Red Hat Enterprise Linux 7

Via RHSA-2016:1237 https://access.redhat.com/errata/RHSA-2016:1237
Comment 7 Stefan Cornelius 2016-08-11 07:03:04 EDT 
To clear things up a bit:

* gnuplot files should not be processed when coming from an untrusted source, as they can contain dangerous commands.
* ImageMagick does not care. If it detects a gnuplot file, it tries to delegate it to gnuplot.

If gnuplot is not installed or ImageMagick can't launch gnuplot, there should be no issue.

RHEL5 specific: The gnuplot delegation in RHEL5 is broken due to an unrelated issue. ImageMagick fails to launch gnuplot correctly, thus preventing this attack vector.
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