Bug 1891612 (CVE-2020-25666) - CVE-2020-25666 ImageMagick: outside the range of representable values of type int and signed integer overflow in MagickCore/histogram.c
Summary: CVE-2020-25666 ImageMagick: outside the range of representable values of type...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2020-25666
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: 1901229 1901230 1910562
Blocks: 1891602
TreeView+ depends on / blocked
 
Reported: 2020-10-26 20:20 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-02-15 20:42 UTC (History)
7 users (show)

Fixed In Version: ImageMagick 7.0.9-0
Doc Type: If docs needed, set a value
Doc Text:
There are 4 places in HistogramCompare() in MagickCore/histogram.c where an integer overflow is possible during simple math calculations. This occurs in the rgb values and `count` value for a color. The patch uses casts to `ssize_t` type for these calculations, instead of `int`. This flaw could impact application reliability in the event that ImageMagick processes a crafted input file.
Clone Of:
Environment:
Last Closed: 2020-11-24 23:34:01 UTC
Embargoed:

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Description Guilherme de Almeida Suckevicz 2020-10-26 20:20:12 UTC 
ImageMagick 7.0.8-68 there are 4 outside the range of representable values of type 'int' and a signed integer overflow at MagickCore/histogram.c.

Reference:
https://github.com/ImageMagick/ImageMagick/issues/1750

Upstream patch:
https://github.com/ImageMagick/ImageMagick/commit/94691f00839dbdf43edb1508af945ab19b388573
Comment 1 Todd Cullum 2020-10-28 21:07:59 UTC 
Flaw summary:

There are 4 places in HistogramCompare() in MagickCore/histogram.c where an integer overflow is possible during simple math calculations. This occurs in the rgb values and `count` value for a color. The patch uses casts to `ssize_t` type for these calculations, instead of `int`. This flaw could impact application reliability in the event that ImageMagick processes a crafted input file.
Comment 2 Todd Cullum 2020-10-28 21:09:39 UTC 
Acknowledgments:

Name: Suhwan Song (Seoul National University)
Comment 3 Todd Cullum 2020-10-29 19:12:08 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 19:01:16 UTC 
Created ImageMagick tracking bugs for this issue:

Affects: epel-8 [bug 1901229]
Affects: fedora-all [bug 1901230]
Comment 5 Product Security DevOps Team 2020-11-24 23:34:01 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-2020-25666
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