An apt security update has been released for Debian GNU/Linux 10 to address out-of-bounds reads resulting in denial of service when processing malformed deb files.

DSA 4808-1: apt security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-4808-1 security@debian.org
  https://www.debian.org/security/ Salvatore Bonaccorso
December 09, 2020   https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : apt
CVE ID : CVE-2020-27350

It was discovered that missing input validation in the ar/tar
implementations of APT, the high level package manager, could cause
out-of-bounds reads or infinite loops, resulting in denial of service
when processing malformed deb files.

For the stable distribution (buster), this problem has been fixed in
version 1.8.2.2.

We recommend that you upgrade your apt packages.

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

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/