https://blog.cyberhacktics.com/hiding-information-by-changing-an-images-height/

This does really helps.

change the hight section in hex

somehow i cant get not broken jpeg file after editing hex using xxd. using hex editor is much easier and faster to solve this https://hexed.it/

try - ff c0 00 11 08 11 11 07 E0

learned lots of stuff

thx for the challenge

amazing, learned much about jpg

dimension of an image are should be the same + hexeditor and rapid table

If you found Mercedes pic then it's not correct way of your thinking ;)

wait, what? how do u pull that sort of magic?

an article that can help: https://www.quora.com/How-do-I-extract-width-and-height-data-from-an-Exif-JPG-hex-format-in-C++

Tips: The flag is 'outside' the pic, but it still part of the file. Think about dimensions.

I suggest use CyberChef and HexEd

This link will help a lot: blog.cyberhacktics.com/hiding-information-by-changing-an-images-height/

Incredibly helpful.

im comaritively new to cyberchef, how do u "check" images with that?

Sooo cool! Learn a lot about jpeg.

I had to fight my way there.

I don't think this should be in the easy section though

Any hint? several people (me included) seem stuck. I have read quite a bit about the jpeg specification, found something about blocks, but nothing helped so far.

Need to read more. Specifically about how does JPEG stores its dimensions.

This challenge really pissed me off, so i gave up on this challenge and after a month i thought let's give it one more try then after a few searchs on how hide data in image dimensions i found this blog which was really helpfully, and finally i solved this problem. (Also used hexed.it website)

https://blog.cyberhacktics.com/hiding-information-by-changing-an-images-height/

<3