The current version of the McAfee software for Ubuntu (deb) is creating files with incorrect usernames. When installing this software using sudo, the pre and post scripts for the package install are being chowned to uid 500. the uid 500 is not a valid user, and therefore trips on a vulnerability scan. Please correct the "mfert" and "mfecma" deb packages to correctly chown these to either root (0) or create a new user for these scripts to be owned by.
-rwxr-xr-x 1 500 500 1157 Nov 17 16:05 /var/lib/dpkg/info/mfert.preinst
-rwxr-xr-x 1 500 users 3074 Nov 17 18:59 /var/lib/dpkg/info/mfecma.postrm
-rwxr-xr-x 1 500 500 322 Nov 17 16:05 /var/lib/dpkg/info/mfert.prerm
-rwxr-xr-x 1 500 500 998 Nov 17 16:05 /var/lib/dpkg/info/mfert.postinst
-rwxr-xr-x 1 500 users 3685 Nov 17 18:59 /var/lib/dpkg/info/mfecma.prerm
-rwxr-xr-x 1 500 users 43408 Nov 17 18:59 /var/lib/dpkg/info/mfecma.postinst
-rwxr-xr-x 1 500 users 8157 Nov 17 18:59 /var/lib/dpkg/info/mfecma.preinst