A gdal security update has been released for Debian GNU/Linux 9 LTS to address two issues.

DLA 2877-1: gdal security update

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Debian LTS Advisory DLA-2877-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Emilio Pozuelo Monfort
January 12, 2022   https://wiki.debian.org/LTS
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Package : gdal
Version : 2.1.2+dfsg-5+deb9u1
CVE ID : CVE-2019-17545 CVE-2021-45943

Two issues were found in GDAL, a geospatial library, that could lead to
denial of service via application crash or possibly the execution of
arbitrary code if maliciously crafted data was parsed.

For Debian 9 stretch, these problems have been fixed in version
2.1.2+dfsg-5+deb9u1.

We recommend that you upgrade your gdal packages.

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

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