The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 ESM: lib64expat1 2.1.0-4ubuntu1.4+esm1 libexpat1 2.1.0-4ubuntu1.4+esm1 Ubuntu 12.04 ESM: lib64expat1 2.0.1-7.2ubuntu1.6 libexpat1 2.0.1-7.2ubuntu1.6 In general, a standard system update will make all the necessary changes.
https://ubuntu.com/security/notices/USN-4040-2
https://ubuntu.com/security/notices/USN-4040-1
CVE-2018-20843
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