CVE-2020-15704 pppd arbitrary file read information disclosure vulnerability

The modprobe child process in the ./debian/patches/loadpppgenericifneeded patch file incorrectly handled module loading. A local non-root attacker could exploit the MODPROBEOPTIONS environment variable to read arbitrary root files. Fixed in 2.4.5-5ubuntu1.4, 2.4.5-5.1ubuntu2.3+esm2,...