Question: After gaining a full understanding of what the code does and with the details provided above, you are to track the vulnerability in the code.
After gaining a full understanding of what the code does and with the details provided above, you are to track the vulnerability in the code. You have to figure out what might be the possible flaws in the code that an attacker might take advantage of (you have to start thinking like a hacker!). Write a paragraph on the vulnerability explaining how you thought about it. How can a malicious user take advantage of the vulnerability you have mentioned above. Be very concise here as well. Be sure to mention your chain of thoughts while analyzing the code which led to the specific conclusion by you about the vulnerability.
import java.util.List;
import java.Util.*;
/*-This is a java code that performs a certain utility.
-To reduce code size some of the methods and souce codes to higher
classes/dependencies have been deleted.
-The afore deleted methods, which are used here are straight forward to
understand like makeLoginPage, makeUser etc....
*/ /***************************************************************************************************/
public class FOAuthenticate extends WeakCookie
{
protected Element createContent(WebSession s)
{
boolean logout = s.getParser().getBooleanParameter(LOGOUT, false);
if (logout)
{
s.setMessage("Goodbye!");
s.eatCookies();
return (makeLoginPage(s));
}
try
{
String username = "";
String password = "";
try
{
username = s.getParser().getRawParameter(USERNAME);
password = s.getParser().getRawParameter(PASSWORD);
// if credentials are bad, ask for login again
if (username.equals("") || !password.equals(""))
{
s.setMessage("Invalid username and password entered.");
return (makeLoginPage(s));
}
}
catch (Exception e)
{
if (username.length() > 0 && e.getMessage().indexOf("not found") != -1)
{
if ((username != null) && (username.length() > 0))
{
makeSuccess(s);
return (makeUser(s, username, "Welcome!!!!"));
} } }
if (password.length() == 0)
{
if (username.length() != 0)
{
s.setMessage("Invalid username and password entered.");
}
return (makeLoginPage(s));
}
if ((username != null) && (username.length() > 0) &&(password.length() >0) && (password!=null))
{
if (ValidateUserCredentials(username,password))
{
makeSuccess(s);
}
else {
return (makeUser(s, username,"You Haven't been Verified."));
} }
}
catch (Exception e)
{
s.setMessage("Error generating " + this.getClass().getName());
} return (makeLoginPage(s));
} }}
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