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Enforce PNG check when posting images #2301
Labels
security
Security issue: can be an active issue, or related to security hygene
Milestone
Only images in PNG format must be permitted through the pageshot app when a user posts a new shot. The app must check the magic number of the image.
PNG image files begin with an 8-byte signature which identifies the file as a PNG file and allows detection of common file transfer problems: \211 P N G \r \n \032 \n (89 50 4E 47 0D 0A 1A 0A).
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