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memory leak in ReadOnePNGImage #600

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bestshow opened this Issue Jul 23, 2017 · 4 comments

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@bestshow

bestshow commented Jul 23, 2017

Version: ImageMagick 7.0.6-2 Q16 x86_64

The ReadOnePNGImage function in png.c:3439 allows attackers to cause a denial of service (memory leak) via a crafted file.

#./convert $FILE OUT.bmp
=================================================================
==104622==ERROR: detected memory leaks

Direct leak of 256 byte(s) in 1 object(s) allocated from:
    #0 0x4eb9c6 in __interceptor_malloc /home/test/Downloads/llvm-clang/llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:66
    #1 0xc383f3 in ReadOnePNGImage /home/test/Downloads/IM-afl/ImageMagick-master/coders/png.c:3439:36
    #2 0xbf7b6e in ReadPNGImage /home/test/Downloads/IM-afl/ImageMagick-master/coders/png.c:4159:9
    #3 0xdeb41c in ReadImage /home/test/Downloads/IM-afl/ImageMagick-master/MagickCore/constitute.c:497:13
    #4 0xdef98d in ReadImages /home/test/Downloads/IM-afl/ImageMagick-master/MagickCore/constitute.c:866:9
    #5 0x1563cf7 in ConvertImageCommand /home/test/Downloads/IM-afl/ImageMagick-master/MagickWand/convert.c:641:18
    #6 0x173f78a in MagickCommandGenesis /home/test/Downloads/IM-afl/ImageMagick-master/MagickWand/mogrify.c:183:14
    #7 0x521f3d in MagickMain /home/test/Downloads/IM-afl/ImageMagick-master/utilities/magick.c:149:10
    #8 0x521f3d in main /home/test/Downloads/IM-afl/ImageMagick-master/utilities/magick.c:180
    #9 0x7fb133770b34 in __libc_start_main /usr/src/debug/glibc-2.17-c758a686/csu/../csu/libc-start.c:274

SUMMARY: 256 byte(s) leaked in 1 allocation(s).

testcase : https://github.com/bestshow/p0cs/blob/master/memory_leak_in_ReadOnePNGImage.png
Credit : ADLab of Venustech

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Confirmed this bug on IM-6.9.9-2 and IM-7.0.6-2.

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glennrp commented Jul 23, 2017

Confirmed this bug on IM-6.9.9-2 and IM-7.0.6-2.

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bastien-roucaries Jul 28, 2017

Could you open a CVE ? https://cveform.mitre.org/

A prod me when done

bastien-roucaries commented Jul 28, 2017

Could you open a CVE ? https://cveform.mitre.org/

A prod me when done

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IM7: commit f299447
IM6: commit 19b03f3

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glennrp commented Jul 28, 2017

IM7: commit f299447
IM6: commit 19b03f3

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fgeek Aug 23, 2017

Please use CVE-2017-13141 for this issue.

fgeek commented Aug 23, 2017

Please use CVE-2017-13141 for this issue.

netbsd-srcmastr pushed a commit to NetBSD/pkgsrc that referenced this issue Sep 9, 2017

Update to 6.9.9.11
Changelog:
2017-09-03  6.9.9-11 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-11, GIT revision 11969:a12fbb873:20170903.

2017-08-28  6.9.9-11 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).
  * Don't overwrite symbolic links when the shred policy is enabled.

2017-08-27  6.9.9-10 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-10, GIT revision 11936:a8112a821:20170827.

2017-08-26  6.9.9-10 Dirk Lemstra <dirk@lem.....org>
  * Fixed thread safety issue inside the pango and librsvg decoder
    (reference: dlemstra/Magick.NET#91).

2017-08-20  6.9.9-9 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-9, GIT revision 11915:5205bda17:20170820.

2017-08-18  6.6.9-9 Glenn Randers-Pehrson <glennrp@image...>
  * Fixed bug with writing tIME chunk when timezone has a negative offset
    (reference: ImageMagick/ImageMagick#685).

2017-08-18  6.9.9-8 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-8, GIT revision 11906:26078285f:20170818.

2017-08-18  6.9.9-8 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).

2017-08-12  6.9.9-7 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-7, GIT revision 11893:8c4c56a0e:20170812
    (Windows binaries out of sync).

2017-08-10  6.9.9-6 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-6, GIT revision 11886:af2b102db:20170810.

2017-08-10  6.9.9-6 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).

2017-08-10  6.9.9-6 Glenn Randers-Pehrson <glennrp@image...>
  * tests/validate.c: Show the reason for failures in the test logs,
    if available.

2017-08-03  6.9.9-6 Glenn Randers-Pehrson <glennrp@image...>
  * Put UTC time in the PNG tIME chunk instead of local time (reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=32447).

2017-08-02  6.9.9-5 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-5, GIT revision 11858:7a555e53f:20170802.

2017-08-01  6.9.9-5 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).

2017-07-29  6.9.9-5 Glenn Randers-Pehrson <glennrp@image...>
  * Properly set image->colorspace in the PNG decoder (previously
    it was setting image->gamma, but only setting image->colorspace
    for grayscale and gray-alpha images.  Reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=32418).
  * Fix improper use of NULL in the JNG decoder (CVE-2017-11750, Reference
    ImageMagick/ImageMagick#632).

2017-07-29  6.9.9-5 Cristy  <quetzlzacatenango@image...>
  * Off by one error for gradient coder (reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=32416).

2017-07-28  6.9.9-4 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-4, GIT revision 11833:4e81160d6:20170728.

2017-07-25  6.9.9-4 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).
  * coders/png.c: Initialized quantum_scanline to prevent a bad free
    (reference ImageMagick/ImageMagick#621).

2017-07-24  6.9.9-4 Glenn Randers-Pehrson <glennrp@image...>
  * Removed write_chunk_from_profile() from coders/png.c because it
    has not worked at least since version 6.7.6.
  * Removed many redundant checks before RelinquishMagickMemory(),
    which is safe to call with a NULL argument.
  * Removed vpAg chunk write support (we are now writing caNv instead).
  * coders/png.c: Initialized quantum_info to prevent memory leakage
    (reference ImageMagick/ImageMagick#582,
    CVE-2017-11539).
  * coders/png.c: fixed NULL dereference when trying to write an empty MNG
    (CVE-2017-11522, reference
    ImageMagick/ImageMagick#586).

2017-07-24  6.9.9-3 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-3, GIT revision 11809:2bd88257b:20170724.

2017-07-23  6.9.9-3 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).

2017-07-23  6.9.9-3 Glenn Randers-Pehrson <glennrp@image...>
  * Fix memory leaks when reading a malformed JNG image:
    ImageMagick/ImageMagick#600).
    ImageMagick/ImageMagick#602).

2017-07-22  6.9.9-2 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-2, GIT revision 11786:21b23bf09:20170722.

2017-07-22  6.9.9-2 Cristy  <quetzlzacatenango@image...>
  * composite -dissolve works again reference
    ImageMagick/ImageMagick#597).

2017-07-21  6.9.9-1 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-1, GIT revision 11782:75f7e994e:20170721.

2017-07-19  6.9.9-1 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).

2017-07-15  6.9.9-1 Glenn Randers-Pehrson <glennrp@image...>
  * Don't write a hex-encoded Exif profile when writing the eXIf chunk.
  * Added caNv, eXIf, and pHYs to the list of PNG chunks to be removed
    by the "-strip" option.

2017-07-15  6.9.9-0 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-0, GIT revision 11738:8903861b2:20170715.

2017-07-13  6.9.9-0 Glenn Randers-Pehrson <glennrp@image...>
  * Implemented PNG eXIf chunk support.

2017-07-08  6.9.9-0 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).
  * Don't use variable float_t / double_t, bump SO (reference
    ImageMagick/ImageMagick#510).
  * Support DNG images with libraw delegate library.

netbsd-srcmastr pushed a commit to NetBSD/pkgsrc that referenced this issue Sep 13, 2017

wiz
ImageMagick: update to 7.0.7.2.
2017-09-11  7.0.7-2 Glenn Randers-Pehrson <glennrp@image...>
  * Use signed integer arithmetic to caluculate timezone corrections (reference
    ImageMagick/ImageMagick#685).

2017-09-09  7.0.7-1 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 7.0.7-1, GIT revision 21065:ab2194121:20170909.

2017-09-09  7.0.7-1 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).

2017-09-05 7.0.7-1 Dirk Lemstra <dirk@lem.....org>
  * Added -define tiff:write-layers=true to add support for writing layered
    tiff files.

2017-09-03  7.0.7-0 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 7.0.7-0, GIT revision 20996:2f8ac2203:20170903.

2017-08-28  7.0.7-0 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).
  * Don't overwrite symbolic links when the shred policy is enabled.

2017-08-27  7.0.6-10 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 7.0.6-10, GIT revision 20920:9940c367a:20170827.

2017-08-27  7.0.6-10 Cristy  <quetzlzacatenango@image...>
  * Support -metric ssim, structual similarity index.

2017-08-26  7.0.6-10 Dirk Lemstra <dirk@lem.....org>
  * Fixed thread safety issue inside the pango and librsvg decoder
    (reference: dlemstra/Magick.NET#91).

2017-08-20  7.0.6-9 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 7.0.6-9, GIT revision 20860:3f307d8ad:20170820.

2017-08-18  7.0.6-9 Glenn Randers-Pehrson <glennrp@image...>
  * Fixed bug with writing tIME chunk when timezone has a negative offset
    (reference: ImageMagick/ImageMagick#685)

2017-08-18  7.0.6-8 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 7.0.6-8, GIT revision 20838:e2eb79427:20170818.

2017-08-14  7.0.6-7 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).
  * Support CubicSpline resize filter.  Define the lobes with the
    -define filter:lobes={2,3,4} (reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=2&t=32506).
  * Prevent assertion failure when creating PDF thumbnail (reference
    ImageMagick/ImageMagick#674).

2017-08-12  7.0.6-7 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 7.0.6-7, GIT revision 20799:0db4d8a16:20170812.

2017-08-12  7.0.6-7 Cristy  <quetzlzacatenango@image...>
  * Improve EPS aliasing (reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=32497).

2017-08-11  7.0.6-7 Dirk Lemstra <dirk@lem.....org>
  * Added a new option called 'dds:fast-mipmaps' (reference
    ImageMagick/ImageMagick#558)
  * The mipmaps of a dds image can now be created from a list of images with
    -define dds:mipmaps=fromlist (reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=2&t=30236).

2017-08-10  7.0.6-6 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 7.0.6-6, GIT revision 20775:061d0fa25:20170810.

2017-08-10  7.0.6-6 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).

2017-08-10  7.0.6-6 Glenn Randers-Pehrson <glennrp@image...>
  * tests/validate.c: Show the reason for failures in the test logs,
    if available.

2017-08-03  7.0.6-6 Glenn Randers-Pehrson <glennrp@image...>
  * Put UTC time in the PNG tIME chunk instead of local time (reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=32447).

2017-08-02  7.0.6-5 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 7.0.6-5, GIT revision 20715:26b28d50a:20170802.

2017-08-01  7.0.6-5 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).

2017-07-29  7.0.6-5 Glenn Randers-Pehrson <glennrp@image...>
  * Properly set image->colorspace in the PNG decoder (previously
    it was setting image->gamma, but only setting image->colorspace
    for grayscale and gray-alpha images.  Reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=32418).
  * Fix improper use of NULL in the JNG decoder (CVE-2017-11750, Reference
    ImageMagick/ImageMagick#632).
  * Added "-define png:ignore-crc" option to PNG decoder. When you know
    your image has no CRC or ADLER32 errors, this can speed up decoding.
    It is also helpful in debugging bug reports from "fuzzers".

2017-07-29  7.0.6-5 Cristy  <quetzlzacatenango@image...>
  * Off by one error for gradient coder (reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=32416),
    ImageMagick/ImageMagick#612).

2017-07-28  7.0.6-4 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 7.0.6-4, GIT revision 20657:4e81160d6:20170728.

2017-07-24  7.0.6-4 Cristy  <quetzlzacatenango@image...>
  * YUV coder no longer renders streaks (reference
    ImageMagick/ImageMagick#612).
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues) including
    ImageMagick/ImageMagick#618 (CVE-2017-12676).
  * coders/png.c: Initialized quantum_scanline and quantum_info
    to prevent a bad free (reference
    ImageMagick/ImageMagick#621).

2017-07-25  7.0.6-4 Glenn Randers-Pehrson <glennrp@image...>
  * Removed write_chunk_from_profile() from coders/png.c because it has
    not worked at least since version 6.7.6.
  * Removed many redundant checks before RelinquishMagickMemory(), which
    is safe to call with a NULL argument.
  * Added experimental PNG orNT chunk, to store image->orientation.
  * Removed vpAg chunk write support (we are now writing caNv instead).

2017-07-24  7.0.6-3 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 7.0.6-3, GIT revision 20598:cc9c43b44:20170724.

2017-07-23  7.0.6-3 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).

2017-07-23  7.0.6-3 Glenn Randers-Pehrson <glennrp@image...>
  * Fix memory leaks when reading a malformed JNG image:
    ImageMagick/ImageMagick#600 (CVE-2017-13141),
    ImageMagick/ImageMagick#602 (CVE-2017-12565).

2017-07-21  7.0.6-2 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 7.0.6-2, GIT revision 20549:62fcf3d96:20170721.

2017-07-19  7.0.6-2 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).
  * The -monochrome option no longer returns a blank canvas (reference
    ImageMagick/ImageMagick#594).
  * coders/png.c: fixed memory leak of quantum_info (CVE-2017-11539, reference
    ImageMagick/ImageMagick#582
  * coders/png.c: fixed NULL dereference when trying to write an empty MNG
    (CVE-2017-11522, reference
    ImageMagick/ImageMagick#586).

2017-07-15  7.0.6-2 Glenn Randers-Pehrson <glennrp@image...>
  * Added caNv, eXIf, and pHYs to the list of PNG chunks to be removed
    by the "-strip" option.

2017-07-15  7.0.6-1 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 7.0.6-1, GIT revision 20447:c2a315e10:20170715.

2017-07-13  7.0.6-1 Glenn Randers-Pehrson <glennrp@image...>
  * Implemented PNG eXIf chunk support.

2017-07-08  7.0.6-1 Cristy  <quetzlzacatenango@image...>
  * Support new -auto-threshold option.  OTSU and Triangle methods are
    currently supported.  Look for the Kapur method in the next release.
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).
  * Don't use variable float_t / double_t, bump SO (reference
    ImageMagick/ImageMagick#510).
  * Support DNG images with libraw delegate library.

2017-07-02  7.0.6-1 Glenn Randers-Pehrson <glennrp@image...>
  * Reject PNG file that is too small (under 60 bytes) to contain
    a valid image.
  * Reject JPEG file that is too small (under 107 bytes) to contain
    a valid image.
  * Reject JNG file that is too small (under 147 bytes) to contain
    a valid image.

2017-06-22  7.0.6-1 Glenn Randers-Pehrson <glennrp@image...>
  * Stop a memory leak in read_user_chunk_callback() (reference
    ImageMagick/ImageMagick#517,
    CVE 2017-11310).

buildroot-auto-update pushed a commit to buildroot/buildroot that referenced this issue Sep 17, 2017

package/imagemagick: security bump to version 7.0.7-1
Quoting CVE-related issues from
https://github.com/ImageMagick/ImageMagick/blob/master/ChangeLog

2017-07-29 7.0.6-5 Glenn Randers-Pehrson <glennrp@image...>
  * Fix improper use of NULL in the JNG decoder (CVE-2017-11750, Reference
    ImageMagick/ImageMagick#632).

2017-07-24 7.0.6-4 Cristy <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues) including
    ImageMagick/ImageMagick#618 (CVE-2017-12676).

2017-07-23  7.0.6-3 Glenn Randers-Pehrson <glennrp@image...>
  * Fix memory leaks when reading a malformed JNG image:
    ImageMagick/ImageMagick#600 (CVE-2017-13141),
    ImageMagick/ImageMagick#602 (CVE-2017-12565).

2017-07-19 7.0.6-2 Cristy <quetzlzacatenango@image...>
  * coders/png.c: fixed memory leak of quantum_info (CVE-2017-11539, reference
    ImageMagick/ImageMagick#582
  * coders/png.c: fixed NULL dereference when trying to write an empty MNG
    (CVE-2017-11522, reference
    ImageMagick/ImageMagick#586).

2017-06-22  7.0.6-1 Glenn Randers-Pehrson <glennrp@image...>
  * Stop a memory leak in read_user_chunk_callback() (reference
    ImageMagick/ImageMagick#517,
    CVE 2017-11310).

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

buildroot-auto-update pushed a commit to buildroot/buildroot that referenced this issue Sep 21, 2017

package/imagemagick: security bump to version 7.0.7-1
Quoting CVE-related issues from
https://github.com/ImageMagick/ImageMagick/blob/master/ChangeLog

2017-07-29 7.0.6-5 Glenn Randers-Pehrson <glennrp@image...>
  * Fix improper use of NULL in the JNG decoder (CVE-2017-11750, Reference
    ImageMagick/ImageMagick#632).

2017-07-24 7.0.6-4 Cristy <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues) including
    ImageMagick/ImageMagick#618 (CVE-2017-12676).

2017-07-23  7.0.6-3 Glenn Randers-Pehrson <glennrp@image...>
  * Fix memory leaks when reading a malformed JNG image:
    ImageMagick/ImageMagick#600 (CVE-2017-13141),
    ImageMagick/ImageMagick#602 (CVE-2017-12565).

2017-07-19 7.0.6-2 Cristy <quetzlzacatenango@image...>
  * coders/png.c: fixed memory leak of quantum_info (CVE-2017-11539, reference
    ImageMagick/ImageMagick#582
  * coders/png.c: fixed NULL dereference when trying to write an empty MNG
    (CVE-2017-11522, reference
    ImageMagick/ImageMagick#586).

2017-06-22  7.0.6-1 Glenn Randers-Pehrson <glennrp@image...>
  * Stop a memory leak in read_user_chunk_callback() (reference
    ImageMagick/ImageMagick#517,
    CVE 2017-11310).

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(cherry picked from commit 1cf1b98)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

buildroot-auto-update pushed a commit to buildroot/buildroot that referenced this issue Oct 16, 2017

package/imagemagick: security bump to version 7.0.7-1
Quoting CVE-related issues from
https://github.com/ImageMagick/ImageMagick/blob/master/ChangeLog

2017-07-29 7.0.6-5 Glenn Randers-Pehrson <glennrp@image...>
  * Fix improper use of NULL in the JNG decoder (CVE-2017-11750, Reference
    ImageMagick/ImageMagick#632).

2017-07-24 7.0.6-4 Cristy <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues) including
    ImageMagick/ImageMagick#618 (CVE-2017-12676).

2017-07-23  7.0.6-3 Glenn Randers-Pehrson <glennrp@image...>
  * Fix memory leaks when reading a malformed JNG image:
    ImageMagick/ImageMagick#600 (CVE-2017-13141),
    ImageMagick/ImageMagick#602 (CVE-2017-12565).

2017-07-19 7.0.6-2 Cristy <quetzlzacatenango@image...>
  * coders/png.c: fixed memory leak of quantum_info (CVE-2017-11539, reference
    ImageMagick/ImageMagick#582
  * coders/png.c: fixed NULL dereference when trying to write an empty MNG
    (CVE-2017-11522, reference
    ImageMagick/ImageMagick#586).

2017-06-22  7.0.6-1 Glenn Randers-Pehrson <glennrp@image...>
  * Stop a memory leak in read_user_chunk_callback() (reference
    ImageMagick/ImageMagick#517,
    CVE 2017-11310).

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(cherry picked from commit 1cf1b98)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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