A Privoxy security update has been released for Ubuntu Linux 18.04 LTS and 20.04 LTS.

==========================================================================
Ubuntu Security Notice USN-5826-1
January 25, 2023

privoxy vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in Privoxy.

Software Description:
- privoxy: Privacy enhancing HTTP Proxy

Details:

Joshua Rogers discovered that Privoxy incorrectly handled memory allocation. An
attacker could possibly use this issue to cause a denial of service. (CVE-2021-44540)

Artem Ivanov discovered that Privoxy incorrectly handled input validations. An
attacker could possibly use this issue to perform cross-site scripting (XSS) attacks.
(CVE-2021-44543)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
privoxy 3.0.28-2ubuntu0.2

Ubuntu 18.04 LTS:
privoxy 3.0.26-5ubuntu0.3

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-5826-1
CVE-2021-44540, CVE-2021-44543