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

DLA 2548-1: privoxy security update

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Debian LTS Advisory DLA-2548-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Utkarsh Gupta
February 07, 2021   https://wiki.debian.org/LTS
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Package : privoxy
Version : 3.0.26-3+deb9u1
CVE ID : CVE-2020-35502 CVE-2021-20209 CVE-2021-20210
CVE-2021-20211 CVE-2021-20212 CVE-2021-20213
CVE-2021-20215 CVE-2021-20216 CVE-2021-20217

Multiple vulnerabilites were discovered in privoxy, a privacy
enhancing HTTP proxy, like memory leaks, dereference of a
NULL-pointer, et al.

For Debian 9 stretch, these problems have been fixed in version
3.0.26-3+deb9u1.

We recommend that you upgrade your privoxy packages.

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

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