A mupdf security update has been released for Debian GNU/Linux 9 LTS to address several issues, including denial of service by heap-based buffer overflows, segmentation faults, and out of bound reads.

DLA 2289-1: mupdf security update

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Debian LTS Advisory DLA-2289-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Thorsten Alteholz
July 26, 2020   https://wiki.debian.org/LTS
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Package : mupdf
Version : 1.9a+ds1-4+deb9u5
CVE ID : CVE-2018-16647 CVE-2018-16648 CVE-2018-18662
CVE-2019-6130 CVE-2019-13290

Several issues have been found in mupdf, a lightweight PDF viewer.

The issues could be exploited by crafted PDF files that result in denial
of service by heap-based buffer overflows, segmentation faults or out of
bound reads.

For Debian 9 stretch, these problems have been fixed in version
1.9a+ds1-4+deb9u5.

We recommend that you upgrade your mupdf packages.

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

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