The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS: pound 2.6-6.1ubuntu0.1 In general, a standard system update will make all the necessary changes.
https://ubuntu.com/security/notices/USN-4702-1
CVE-2016-10711, CVE-2018-21245
https://launchpad.net/ubuntu/+source/pound/2.6-6.1ubuntu0.1
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