An imagemagick security update has been released for Debian GNU/Linux 9 LTS to address several security vulnerabilities.

DLA 2523-1: imagemagick security update

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Debian LTS Advisory DLA-2523-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/
January 12, 2021   https://wiki.debian.org/LTS
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Package : imagemagick
Version : 8:6.9.7.4+dfsg-11+deb9u11
CVE ID : CVE-2017-14528 CVE-2020-19667 CVE-2020-25665 CVE-2020-25674
CVE-2020-27560 CVE-2020-27750 CVE-2020-27760 CVE-2020-27763
CVE-2020-27765 CVE-2020-27773 CVE-2020-29599
Debian Bug : 878544 972797 977205

Several security vulnerabilities were found in ImageMagick, a suite of
image manipulation programs. An attacker could cause denial of service
and execution of arbitrary code when a crafted image file is
processed.

CVE-2017-14528

The TIFFSetProfiles function in coders/tiff.c has incorrect
expectations about whether LibTIFF TIFFGetField return values
imply that data validation has occurred, which allows remote
attackers to cause a denial of service (use-after-free after an
invalid call to TIFFSetField, and application crash) via a crafted
file.

CVE-2020-19667

Stack-based buffer overflow and unconditional jump in ReadXPMImage
in coders/xpm.c

CVE-2020-25665

The PALM image coder at coders/palm.c makes an improper call to
AcquireQuantumMemory() in routine WritePALMImage() because it
needs to be offset by 256. This can cause a out-of-bounds read
later on in the routine. This could cause impact to reliability.

CVE-2020-25674

WriteOnePNGImage() from coders/png.c (the PNG coder) has a for
loop with an improper exit condition that can allow an
out-of-bounds READ via heap-buffer-overflow. This occurs because
it is possible for the colormap to have less than 256 valid values
but the loop condition will loop 256 times, attempting to pass
invalid colormap data to the event logger.

CVE-2020-27560

ImageMagick allows Division by Zero in OptimizeLayerFrames in
MagickCore/layer.c, which may cause a denial of service.

CVE-2020-27750

A flaw was found in MagickCore/colorspace-private.h and
MagickCore/quantum.h. An attacker who submits a crafted file that
is processedcould trigger undefined behavior in the form of values
outside the range of type `unsigned char` and math division by
zero. This would most likely lead to an impact to application
availability, but could potentially cause other problems related
to undefined behavior.

CVE-2020-27760

In `GammaImage()` of /MagickCore/enhance.c, depending on the
`gamma` value, it's possible to trigger a divide-by-zero condition
when a crafted input file is processed by ImageMagick. This could
lead to an impact to application availability.

CVE-2020-27763

A flaw was found in MagickCore/resize.c. An attacker who submits a
crafted file that is processed by ImageMagick could trigger
undefined behavior in the form of math division by zero. This
would most likely lead to an impact to application availability,
but could potentially cause other problems related to undefined
behavior.

CVE-2020-27765

A flaw was found in MagickCore/segment.c. An attacker who submits
a crafted file that is processed by ImageMagick could trigger
undefined behavior in the form of math division by zero. This
would most likely lead to an impact to application availability,
but could potentially cause other problems related to undefined
behavior.

CVE-2020-27773

A flaw was found 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.

CVE-2020-29599

ImageMagick mishandles the -authenticate option, which allows
setting a password for password-protected PDF files. The
user-controlled password was not properly escaped/sanitized and it
was therefore possible to inject additional shell commands via
coders/pdf.c.

For Debian 9 stretch, these problems have been fixed in version
8:6.9.7.4+dfsg-11+deb9u11.

We recommend that you upgrade your imagemagick packages.

For the detailed security status of imagemagick please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/imagemagick

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS