kotlin - I will never forget that screenshot of a corrupt jar file viewed in 7-Zip containing something with a compressed size of - devRant

Ranter

Comments

13

Kimmax

11106

5y

That's a "zip" bomb and specifically crafted
2

Root

82557

5y

I made a few RLEs like that.
9

Demolishun

34807

5y

Want... for a friend...
2

stop

6867

5y

There is c-code which is, when compiled with gcc and special arguments, results in a 4 GB Binary.
2

Demolishun

34807

5y

@stop Well there is compiling in debug. I compiled a game engine that normally is <50MB. When compiled with debug on it was like 1GB.
1

kescherRant

24220

5y

@Kimmax No, that was the result of a CI pipeline. That wasn't a zip bomb, it was corrupted. Can't provide further details without breaking an NDA
2

Demolishun

34807

5y

@kescherRant Well its just 19 bytes. That means it could be brute force recreated? 0 to 255 for each byte. Keep trying until zip sees it as a valid zip. That might take a while...
2

endor

5751

5y

@kescherRant so basically an accidental zipbomb then?
1

kescherRant

24220

5y

@Demolishun It showed up as LZMA with broken parameters in 7-Zip. I don't think it can be recreated in a valid way. Not even a valid .jar in the first place.
1

kescherRant

24220

5y

@endor Yup.
4

Root

82557

5y

@Demolishun Or just read the format specs. It's easy to make. RLE is like trivial.
0

TheAwesome98

168

5y

my god, please show me that

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