Windows Metafile definition of Windows Metafile in the Free Online Encyclopedia.

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The native vector graphics file format in Windows. Windows Metafiles also can hold bitmaps and text. The original 16-bit format uses the .WMF file extension. The subsequent 32-bit format, which supports more sophisticated graphics functions, generates .EMF (Enhanced MetaFile) files.

Actual Drawing Commands
WMF and EMF files are made up of Windows drawing commands (GDI calls), which results in an efficient format that renders illustrations very quickly. Metafiles are also used by programs to hold data between sessions, and Windows uses it for temporary storage in the Clipboard.

Standard and Placeable Versions
The standard WMF file uses an 18-byte header followed by GDI command records. There are two additional WMF variations that place another header in front of the standard header. A Placeable Metafile uses a 22-byte header containing x-y coordinates for positioning the image on the page. A Clipboard Metafile uses an 8- or 16-byte header. In an EMF file, all header information, including Placeable and Clipboard data, is stored in the first GDI command record.

Eset warns that a wave of malware variants based on this exploit is likely, citing a similar pattern for the Microsoft Windows Metafile exploit that was released in late December 2005.

Eset Delivers Generic Patch for Microsoft Word Vulnerability; Eset ... by Business Wire

Secure Computing Corporation (NASDAQ:SCUR), the experts in securing connections between people, applications, and networks(TM), today announced that customers using the Sidewinder G2(R) Security Appliance and SmartFilter(R) Web filter are protected from the new forms of the Windows MetaFile (WMF) vulnerability because of Secure Computing's multilayered, defense-in-depth security architecture.

As New Windows MetaFile (WMF) Attacks Occur, Secure Computing ... by Business Wire

In addition to issues patched by Microsoft today, the TippingPoint IPS also provided preemptive protection against the zero day Microsoft vulnerability in Windows Metafile (WMF) on December 28, 2005, nine days in advance of Microsoft patch availability January 5, 2006.

TippingPoint Preemptively Protects Customers against Microsoft ... by Business Wire

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