Sql Injection Challenge 5 Security: Shepherd

If you are submitting via a URL bar, remember that spaces should be %20 and hashes should be %23 .

| Function | Purpose | Example | | :--- | :--- | :--- | | SUBSTRING(string, start, length) | Extract part of a string | SUBSTRING('abc',1,1) = 'a' | | ASCII(character) | Get ASCII value of char | ASCII('A') = 65 | | LENGTH(string) | Get length of string | LENGTH('hash') = 4 | | BINARY | Force case-sensitive compare | BINARY 'A' = 'a' (false) | Sql Injection Challenge 5 Security Shepherd

For Challenge 5, the magic number is often or 4 columns. If you are submitting via a URL bar,

To test if the first character is 'a' (ASCII 97): Use: Now the painstaking part: For each position

Sometimes the WAF or input filter blocks SELECT , SUBSTRING , or spaces. Use:

Now the painstaking part: For each position (1 through 32), determine the character.

5' AND (ASCII(SUBSTRING((SELECT hash FROM keys WHERE id=1), [position], 1)) ) > [ascii_value] AND '1'='1