A kernel driver, namely DLMFENC.sys, bundled with the DESLock+ client application 4.8.16 and earlier contains a locally exploitable heap based buffer overflow in the handling of an IOCTL message of type 0x0FA4204. The vulnerability is present due to the kernel driver failing to allocate sufficient memory on the kernel heap to contain a user supplied string as such the string is copied into a buffer of constant size (0x1000-bytes) and thus an overflow condition results. Access to the kernel driver is permitted through an obfuscated interface whereby bytes of user supplied message are "authenticated" via an obfuscation routine employing a linear equation.

The dlpcrypt.sys kernel driver 0.1.1.27 in DESlock+ 4.0.2 allows local users to gain privileges via a crafted IOCTL 0x80012010 request to the DLPCryptCore device.

DLMFENC.sys 1.0.0.28 in DESlock+ 3.2.7 allows local users to cause a denial of service (system crash) or potentially execute arbitrary code via a certain DLMFENC_IOCTL request to \\.\DLKPFSD_Device that overwrites a pointer, probably related to use of the ProbeForRead function when ProbeForWrite was intended.

The Virtual Token driver (vdlptokn.sys) 1.0.2.43 in DESlock+ 3.2.7 allows local users to cause a denial of service (system crash) via a crafted IOCTL request to \Device\DLPTokenWalter0.

DESlock+ 3.2.6 and earlier, when DLMFENC.sys 1.0.0.26 and DLMFDISK.sys 1.2.0.27 are present, allows local users to gain privileges via a certain DLMFENC_IOCTL request to \\.\DLKPFSD_Device that overwrites a pointer, aka the "ring0 link list zero SYSTEM" vulnerability.

DLMFENC.sys 1.0.0.26 in DESlock+ 3.2.6 and earlier allows local users to cause a denial of service (system crash) via a certain ZERO_MEM DLMFENC_IOCTL request to \\.\DLKPFSD_Device, aka the "ring0 link list zero" vulnerability.

Memory leak in DLMFENC.sys 1.0.0.26 in DESlock+ 3.2.6 and earlier allows local users to cause a denial of service (kernel memory consumption) via a series of DLMFENC_IOCTL requests to \\.\DLKPFSD_Device that allocate "link list structures."

DLMFDISK.sys 1.2.0.27 in DESlock+ 3.2.6 and earlier allows local users to gain privileges via a certain DLKFDISK_IOCTL request to \\.\DLKFDisk_Control that overwrites a data structure associated with a mounted pseudo-filesystem, aka the "ring0 SYSTEM" vulnerability.