Virtual Device Metafile - definizione. Che cos'è Virtual Device Metafile
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Cosa (chi) è Virtual Device Metafile - definizione

Virtual Device

Virtual device         
A virtual device in Unix is a file such as :/dev/null or :/dev/urandom, that is treated as a device, as far as user level software is concerned, but is generated by the kernel without reference to hardware.
Windows Metafile vulnerability         
SECURITY VULNERABILITY IN THE WAY SOME VERSIONS OF THE MICROSOFT WINDOWS OPERATING SYSTEM HANDLED IMAGES IN THE WINDOWS METAFILE FORMAT
2005 WMF vulnerability; WMF vulnerability; WMF (exploit); Windows metafile vulnerability; WMF Exploit; WMF exploit; Wmf vulnerability; WMF Backdoor; Windows Metafile Vulnerability; Metafile image code execution
The Windows Metafile vulnerability—also called the Metafile Image Code Execution and abbreviated MICE—is a security vulnerability in the way some versions of the Microsoft Windows operating system handled images in the Windows Metafile format. It permits arbitrary code to be executed on affected computers without the permission of their users.
Virtual Device Driver         
WIKIMEDIA DISAMBIGUATION PAGE
Virtual device driver (disambiguation)
<operating system> (VxD) A device driver under {Windows 3.x}/Windows 95 running as part of the kernel and thus having access to the memory of the kernel and all running processes as well as raw access to the hardware. VxD's usually have the filename extension .386 under Windows 3.x and .vxd under Windows 95. VxD's written for Windows 3.x can be used under Windows 95 but not vice versa. (1997-02-27)

Wikipedia

Virtual device

A virtual device in Unix is a file such as /dev/null or /dev/urandom, that is treated as a device, as far as user level software is concerned, but is generated by the kernel without reference to hardware.

For instance when /dev/null is written to, the kernel tells the program it wrote everything to it (without actually writing it anywhere), and when read from, the reading program is told that it has reached the end of the file. It is a device file (it can be made with mknod for instance), but does not reference any hardware.

DOS-, Windows- and OS/2-like operating systems define the NUL device that performs a similar function (but is implemented as part of the file name processing – no actual file exists by that name).