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Debian LTS Advisory DLA-2672-1                [email protected]
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