Apport 2.13 through 2.20.7 does not properly handle crashes originating from a PID namespace allowing local users to create certain files as root which an attacker could leverage to perform a denial of service via resource exhaustion or possibly gain root privileges, a different vulnerability than CVE-2017-14179.
https://usn.ubuntu.com/usn/usn-3480-1
https://people.canonical.com/~ubuntu-security/cve/?cve=CVE-2017-14180
https://launchpad.net/bugs/1726372
https://bazaar.launchpad.net/~apport-hackers/apport/trunk/revision/3171