GitHub - DavidBuchanan314/ambiguous-png-packer: Craft PNG files that appear completely different in Apple software [NOW PATCHED]You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session. Dismiss alert
![GitHub - DavidBuchanan314/ambiguous-png-packer: Craft PNG files that appear completely different in Apple software [NOW PATCHED]](https://cdn-ak-scissors.b.st-hatena.com/image/square/710ebd325ae4f04543c9903776e36eaa7babdaa5/height=288;version=1;width=512/https%3A%2F%2Fopengraph.githubassets.com%2Fa29b857db1e46cbeb34fa347255ac0c4c46627b33dfc921b14a78508f6220cd0%2FDavidBuchanan314%2Fambiguous-png-packer)
Connecting the iDOTs - The Hacker Factor Blog
Last night's insomnia gave me some time to work through one of the big PNG forensics mysteries in life: What does Apple's iDOT chunk do? PNG Chunks Yes, they are really called "chunks" and Apple provides their own proprietary one called an iDOT. As far as I can tell, nobody has managed to reverse-engineer it. (I really wanted to work into this blog a pun about Apple blowing chunks, but I couldn't
PNG Parser Differential
This PNG image renders differently in Apple vs non-Apple decoders: If you're using Apple-flavoured software, you should see "HELLO APPLE", and on all other software, you should see "HELLO WORLD". I found this while writing my own multi-threaded PNG decoder. While pondering my design, I realised that I had an exploitable implementation bug. After learning that Apple has their own implementation of
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Ambiguous Decodes · Issue #3 · DavidBuchanan314/parallel-png-proposal
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