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

DLA 2672-1: imagemagick security update

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Debian LTS Advisory DLA-2672-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Anton Gladky
June 02, 2021   https://wiki.debian.org/LTS
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Package : imagemagick
Version : 8:6.9.7.4+dfsg-11+deb9u13
CVE ID : CVE-2020-27751 CVE-2021-20243 CVE-2021-20245 CVE-2021-20309
CVE-2021-20312 CVE-2021-20313

Multiple security issues have been discovered in imagemagick.

CVE-2020-27751

A flaw was found in MagickCore/quantum-export.c. 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 long long` as well as a shift exponent that is too large for
64-bit type. This would most likely lead to an impact to application availability,
but could potentially cause other problems related to undefined behavior.

CVE-2021-20243

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.

CVE-2021-20245

A flaw was found in coders/webp.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.

CVE-2021-20309

A division by zero in WaveImage() of MagickCore/visual-effects.c may trigger
undefined behavior via a crafted image file submitted to an application using
ImageMagick.

CVE-2021-20312

An integer overflow in WriteTHUMBNAILImage of coders/thumbnail.c may trigger
undefined behavior via a crafted image file that is submitted by an attacker
and processed by an application using ImageMagick.

CVE-2021-20313

A potential cipher leak when the calculate signatures in TransformSignature is possible.

For Debian 9 stretch, these problems have been fixed in version
8:6.9.7.4+dfsg-11+deb9u13.

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