https://bugzilla.wikimedia.org/show_bug.cgi?id=46921

Jesús Martínez Novo (Ciencia Al Poder) <[email protected]> changed:

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--- Comment #5 from Jesús Martínez Novo (Ciencia Al Poder) 
<[email protected]> ---
(In reply to comment #3)
> Created attachment 12039 [details]
> sample:
> https://commons.wikimedia.org/w/index.php?title=File:Fresh_Relic_4531.JPG
> 
> My computer just crashed (step by step human input devices stopped working)
> after viewing one of them so I really hope they do not contain evil code.

This one seems to contain a password protected file. Opening it with 7z prompts
for a password. The second one (12040) should contain something also, although
7z was unable to detect an archive there. As one can see, both images are
displayed fast (while downloading) and then the browser keeps downloading data
even if the image is already displayed.

As I've read, it's extremely easy to add any file inside a jpeg and yet have an
absolutely valid image that displays perfectly. It can be done by just
concatenating the contents of a file to an existing jpeg image.

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