The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 ESM: curl 7.47.0-1ubuntu2.19+esm1 libcurl3 7.47.0-1ubuntu2.19+esm1 libcurl3-gnutls 7.47.0-1ubuntu2.19+esm1 libcurl3-nss 7.47.0-1ubuntu2.19+esm1 Ubuntu 14.04 ESM: curl 7.35.0-1ubuntu2.20+esm8 libcurl3 7.35.0-1ubuntu2.20+esm8 libcurl3-gnutls 7.35.0-1ubuntu2.20+esm8 libcurl3-nss 7.35.0-1ubuntu2.20+esm8 In general, a standard system update will make all the necessary changes.
https://ubuntu.com/security/notices/USN-5079-2
https://ubuntu.com/security/notices/USN-5079-1
CVE-2021-22946, CVE-2021-22947
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