The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 ESM: ca-certificates 20211016~16.04.1~esm2 Ubuntu 14.04 ESM: ca-certificates 20211016~14.04.1~esm1 In general, a standard system update will make all the necessary changes.
https://ubuntu.com/security/notices/USN-5761-2
https://ubuntu.com/security/notices/USN-5761-1
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