A privoxy security update has been released for Debian GNU/Linux 9 LTS.

DLA 2844-1: privoxy security update

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Debian LTS Advisory DLA-2844-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Utkarsh Gupta
December 13, 2021   https://wiki.debian.org/LTS
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Package : privoxy
Version : 3.0.26-3+deb9u3
CVE ID : CVE-2021-44540 CVE-2021-44543

Artem Ivanov and Joshua Rogers found an XSS and a DOS issue,
respectively, affecting src:privoxy, a non-caching web proxy with
advanced filtering capabilities for enhancing privacy, modifying
web page data and HTTP headers, controlling access, and removing
ads and other obnoxious Internet junk.

For Debian 9 stretch, these problems have been fixed in version
3.0.26-3+deb9u3.

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