The ZwOpenSection function in Integrity Protection Driver (IPD) 1.4 and earlier allows local users to cause a denial of service (crash) via an invalid pointer in the "oa" argument.
NtCreateSymbolicLinkObject in ntdll.dll in Integrity Protection Driver (IPD) 1.2 and 1.3 allows local users to create and overwrite arbitrary files via a symlink attack on \winnt\system32\drivers using the subst command.
restrictEnabled in Integrity Protection Driver (IPD) 1.2 delays driver installation for 20 minutes, which allows local users to insert malicious code by setting system clock to an earlier time.
Integrity Protection Driver (IPD) 1.2 and earlier blocks access to \Device\PhysicalMemory by its name, which could allow local privileged processes to overwrite kernel memory by accessing the device through a symlink.