Supported File Types

File type	Description
doc	Microsoft Word 97-2003 Document
dot	Microsoft Word 97-2003 Template
docx	Microsoft Word 2007+ Document
docm	Microsoft Word 2007+ Macro-Enabled Document
dotx	Microsoft Word 2007+ Template
dotm	Microsoft Word 2007+ Macro-Enabled Template
rtf	Microsoft Rich Text Format
xls	Microsoft Excel 97-2003 Workbook
xlt	Microsoft Excel 97-2003 Template
xlsx	Microsoft Excel 2007+ Workbook
xlsm	Microsoft Excel 2007+ Macro-Enabled Workbook
xltx	Microsoft Excel 2007+ Template
xltm	Microsoft Excel 2007+ Macro-Enabled Template
ppt	Microsoft PowerPoint 97-2003 Presentation
pptx	Microsoft PowerPoint 2007+ Presentation
pptm	Microsoft PowerPoint 2007+ Macro-Enabled Presentation
odt	OpenDocument Text
ods	OpenDocument Spreadsheet
ott	OpenDocument Document Template
ots	OpenDocument Spreadsheet Template
odp	OpenDocument Presentation
otp	OpenDocument Presentation Template
html	Hypertext Markup Language
pdf	Adobe Portable Document Format
xml	Extensible Markup Language
ics	iCalendar
lnk	Windows Shortcut
jpg	JPEG Image
jpx	JPEG 2000
bmp	Windows Bitmap Image
png	Portable Network Graphics
tiff	Tagged Image File Format
svg	Scalable Vector Graphics
emf	Windows Enhanced Metafile
webp	Google Image File Format for Web
dcm	Digital Imaging and Communications in Medicine
zip	ZIP Archive

Notes:

• For images and media files, CDR doesn’t "edit" the visual content, ensuring that the original and sanitized versions maintain the same appearance. However, quality may be affected due to the decoding, processing, and re-encoding steps involved in disarming potential threats.

• When an Excel file is being sanitized, the cleaning time increases as the file size or the number of records grows. If the Excel file is very large, the process may be interrupted depending on system resources.

• MS Office files version 95 or older not supported. Only support 97-2003, 2007 or later.

Sanitized Objects

• MS Office

  • Word (Currently converts doc to docx if image sanitization is enabled):

    • Remove macro

    • Detect and remove template injection, attachedTemplate

    • Replace external target relations, hyperlinks etc.

    • Sanitize embedded object

    • Remove binary data

    • Remove metadata

    • Sanitize image

  • Excel:

    • Remove vba_macro, xlm_macro

    • Remove hyperlinks

    • Remove names (it's like cell name ex:Auto_Open)

    • Sanitize image

    • Remove metadata

  • Powerpoint

    • Sanitize embedded object

    • Remove binary data

    • Remove macro

    • Sanitize image

• PDF

  • Remove JavaScript

  • Remove suspicious objects

  • Remove embedded files

  • Remove OpenAction

  • Remove AcroForm

  • Remove hyperlinks, metadata

  • Sanitize images

  • Clear overlay data

• HTML

  • Remove JavaScript, iframe

  • Sanitize with whitelist approach

• XML

  • Remove VBA macro

  • Remove DTD entities

  • Remove JavaScript

  • Remove suspicious CDATA

• RTF

  • Remove OLE, suspicious nodes(object/bin/template items)

• Images

  • Reconstruct bitmap images, remove metadata

  • Remove scripts from SVG images

  • Clear DICOM image preamble

  • Remove EMF GDI comment

• Calendar - ICS

  • Sanitize inline attachment

  • Remove external attachment

• OpenDocument

  • Sanitize image

  • Remove macros, OLE objects, hidden text, hyperlink, script

• Archive - ZIP

  • Sanitize all supported files in archive and only recompress sanitized files