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

DLA 2399-1: packagekit security update

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Debian LTS Advisory DLA-2399-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Roberto C. Sánchez
October 07, 2020   https://wiki.debian.org/LTS
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Package : packagekit
Version : 1.1.5-2+deb9u2
CVE ID : CVE-2020-16121 CVE-2020-16122

Two vulnerabilities have been discovered in packagekit, a package
management service.

CVE-2020-16121

Vaisha Bernard discovered that PackageKit incorrectly handled
certain methods. A local attacker could use this issue to learn the
MIME type of any file on the system.

CVE-2020-16122

Sami Niemimäki discovered that PackageKit incorrectly handled local
deb packages. A local user could possibly use this issue to install
untrusted packages, contrary to expectations.

For Debian 9 stretch, these problems have been fixed in version
1.1.5-2+deb9u2.

We recommend that you upgrade your packagekit packages.

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

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