Hacker101 Encrypted Pastebin -

If you modify even one byte of the encrypted URL parameter, the server might return a specific error if the resulting "decrypted" data doesn't have valid padding. This is the smoking gun for a Padding Oracle Attack Breaking Down the Flags Flag 0: Playing with the URL

: PadBuster will iterate through possibilities to reveal the plaintext, which usually contains a JSON-like string including the flag. 3. Flag 1: Bit-Flipping for Unauthorized Access hacker101 encrypted pastebin

If the padding is correct but the data is invalid, the server behaves differently. If you modify even one byte of the

The first flag is often a lesson in paying attention to server responses. By intentionally corrupting the post parameter—such as deleting or modifying a single character—the application may fail to decrypt or unpad the data. Improper error handling. Flag 1: Bit-Flipping for Unauthorized Access If the

If you are a serious bug bounty hunter, you should not rely on Pastebin.com. Hacker101 encourages self-hosting using open-source tools that encrypt before the data hits the disk.