USN-4473-1: libmysofa vulnerabilities

It was discovered that libmysofa incorrectly handled certain input files.
An attacker could possibly use this issue to cause a denial of service or
other unspecified impact.
(CVE-2019-16091, CVE-2019-16092, CVE-2019-16093, CVE-2019-16094,
CVE-2019-16095)