Secure Upload

File upload bypass - Magic bytes

me page

As the challenge is written all over, it's a file upload bypass with changing magic bytes of the file.

The challenge was simple, yet a bit guessy, Instead of bypassing all the png checks and validation, we can upload a simple PNG and append PHP code within it.

PAYATU{png_php_pwnd}

__________heapbytes still pwning

Resources

List of file signaturesWikipedia

Bypassing File Upload Restriction using Magic BytesMedium

File Upload Bypass to RCE == $$$$Medium