Bug 1898295 (CVE-2020-27773) - CVE-2020-27773 ImageMagick: division by zero at MagickCore/gem-private.h
Summary: CVE-2020-27773 ImageMagick: division by zero at MagickCore/gem-private.h
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2020-27773
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1901291 1901292 Red Hat1910529
Blocks: Embargoed1891602
TreeView+ depends on / blocked
 
Reported: 2020-11-16 18:36 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-02-15 20:56 UTC (History)
7 users (show)

Fixed In Version: ImageMagick 7.0.9-0
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in ImageMagick in MagickCore/gem-private.h. An attacker who submits a crafted file that is processed by ImageMagick could trigger undefined behavior in the form of values outside the range of type `unsigned char` or division by zero. This would most likely lead to an impact to application availability, but could potentially cause other problems related to undefined behavior.
Clone Of:
Environment:
Last Closed: 2020-11-24 23:35:26 UTC

Attachments (Terms of Use)

Description Guilherme de Almeida Suckevicz 2020-11-16 18:36:59 UTC 
In ImageMagick, there is a division by zero at MagickCore/gem-private.h and an outside the range of representable values of type 'unsigned char' at MagickCore/quantum.h.

Reference:
https://github.com/ImageMagick/ImageMagick/issues/1739

Upstream patch:
https://github.com/ImageMagick/ImageMagick/commit/3d71aa8265ffaaf686021a6fbd54c037f71ee3a2
Comment 1 Guilherme de Almeida Suckevicz 2020-11-16 18:37:02 UTC 
Acknowledgments:

Name: Suhwan Song (Seoul National University)
Comment 2 Todd Cullum 2020-11-16 20:56:49 UTC 
Red Hat Product Security marked this as Low severity because although it could potentially lead to an impact to application availability, no specific impact was demonstrated in this case.
Comment 3 Todd Cullum 2020-11-16 20:57:53 UTC 
Statement:

This flaw is out of support scope for Red Hat Enterprise Linux 5, 6, and 7. Inkscape is not affected because it no longer uses a bundled ImageMagick in Red Hat Enterprise Linux 8. For more information regarding support scopes, please see https://access.redhat.com/support/policy/updates/errata .
Comment 4 Guilherme de Almeida Suckevicz 2020-11-24 19:30:10 UTC 
Created ImageMagick tracking bugs for this issue:

Affects: epel-8 [bug 1901291]
Affects: fedora-all [bug 1901292]
Comment 5 Product Security DevOps Team 2020-11-24 23:35:26 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-27773
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