A python-gnupg security update has been released for Debian GNU/Linux 9 LTS to address a couple of vulnerabilities.

DLA 2862-1: python-gnupg security update

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Debian LTS Advisory DLA-2862-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Utkarsh Gupta
December 29, 2021   https://wiki.debian.org/LTS
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Package : python-gnupg
Version : 0.3.9-1+deb9u1
CVE ID : CVE-2018-12020 CVE-2019-6690

A couple of vulnerabilites were found in python-gnupg, a Python
wrapper for the GNU Privacy Guard.

CVE-2018-12020

Marcus Brinkmann discovered that GnuPG before 2.2.8 improperly
handled certain command line parameters. A remote attacker
could use this to spoof the output of GnuPG and cause unsigned
e-mail to appear signed.

CVE-2019-6690

It was discovered that python-gnupg incorrectly handled the GPG
passphrase. A remote attacker could send a specially crafted
passphrase that would allow them to control the output of
encryption and decryption operations.

For Debian 9 stretch, these problems have been fixed in version
0.3.9-1+deb9u1.

We recommend that you upgrade your python-gnupg packages.

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

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