The problem can be corrected by updating your system to the following package versions: Ubuntu 15.04: libsasl2-2 2.1.26.dfsg1-13ubuntu0.1 After a standard system update you need to reboot your computer to make all the necessary changes.
https://ubuntu.com/security/notices/USN-2755-1
CVE-2013-4122
https://launchpad.net/ubuntu/+source/cyrus-sasl2/2.1.26.dfsg1-13ubuntu0.1
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