Address Email Error Message Password Return System User
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Email Error Message Examples
about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Information Security smtp error codes Questions Tags Users Badges Unanswered Ask Question _ Information Security Stack Exchange is a question and answer site for information security professionals. Join them; it only takes a minute: either your user was not found or your credentials are incorrect miniclip Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Generic error message for wrong password or username - is this really helpful? up vote 60 down vote favorite 15 It is really common (and I would say it is some kind of security
User Enumeration
basic) to not show on the login page if the username or the password was wrong when a user tries to log in. One should show a generic message instead, like "Password or username are wrong". The reason is not to show potential attackers which usernames are already taken, so it'll be harder to 'hack' an existing account. Sounded reasonable for me, but then something different came on my mind. When you register your account, you type in your username. And when it is already taken, you get an error message - which is not generic! So basically, an attacker could just grab 'correct' user names from the register page, or am I wrong? So what is the point about generic messages than? Non-generic messages would lead to a much better UX. passwords authentication share|improve this question asked Jul 7 '14 at 19:41 verbose-mode 403158 3 There are sites like Yahoo mail for example, where enter the right username and incorrect password gives the generic message. On entering "Incorrect Username" it gives a mess
to the OWASP Testing Guide Project: https://www.owasp.org/index.php/OWASP_Testing_Project 1 Brief Summary 2 Description of the Issue 3 Black Box testing and example 3.1 HTTP Response message 3.2 Other ways to enumerate users 3.3 smtp 550 blocked Guessing Users 4 Gray Box testing and example 5 References Brief Summary The email error message prank scope of this test is to verify if it is possible to collect a set of valid usernames by interacting with
Smtp 554
the authentication mechanism of the application. This test will be useful for the brute force testing, in which we verify if, given a valid username, it is possible to find the corresponding password. http://security.stackexchange.com/questions/62661/generic-error-message-for-wrong-password-or-username-is-this-really-helpful Often, web applications reveal when a username exists on system, either as a consequence of a misconfiguration or as a design decision. For example, sometimes, when we submit wrong credentials, we receive a message that states that either the username is present on the system or the provided password is wrong. The information obtained can be used by an attacker to gain a list of users on https://www.owasp.org/index.php/Testing_for_User_Enumeration_and_Guessable_User_Account_(OWASP-AT-002) system. This information can be used to attack the web application, for example, through a brute force or default username/password attack. Description of the Issue The tester should interact with the authentication mechanism of the application to understand if sending particular requests causes the application to answer in different manners. This issue exists because the information released from web application or web server when we provide a valid username is different than when we use an invalid one. In some cases, we receive a message that reveals if the provided credentials are wrong because an invalid username or an invalid password was used. Sometimes, we can enumerate the existing users by sending a username and an empty password. Black Box testing and example In a black box testing, we know nothing about the specific application, username, application logic, error messages on login page, or password recovery facilities. If the application is vulnerable, we receive a response message that reveals, directly or indirectly, some information useful for enumerating users. HTTP Response message Testing for Valid user/right password Record the server answer when you submit a valid userID and valid password. Result Expected: Using WebScarab, notice the information retrieved from this s
Frustrating, I know. In fact, fixing email delivery issues is one of the top three things we do for our server management customers. You can save yourself some money https://www.rackaid.com/blog/cannot-send-email-how-to-fix-email-sending-and-receiving-errors/ by checking these five items first. 1. Bad Passwords Never ASSUME, because when you ASSUME, you make an ASS of U and ME. -- Jerry Belson This sounds simple enough but many support tickets we see turn out to be simple password issues. People complain they cannot send email and assure us the password is correct. We reset the password and bang -- email error email is flowing again. I think the problem often stems from extra spaces. Firefox and other applications often add a spaces to copy and pasted passwords. To be certain you are not picking up a space, paste the password to your address or search box in your web browser. This is a quick and easy way to verify you've copied the password correctly. If email error message ever in doubt, just reset your password when testing. Wrong Authentication Method Password authentication security and network security are different settings. They both must be correct.If your password fails after resetting, make sure you are using a valid authentication method. Most email clients support a variety of authentication methods such as:
Normal or Plain Password Encrypted Password Kerberos Most systems support normal/plain as well as encrypted passwords. In most cases, you should see an error about "authentication methods" if this is the problem. Password encryption and network security (Tip #5) are often confused. In many cases if you are required to use a secure network connection, you want to use a normal or plain password settings. This is not insecure because by using SSL at the network level, then entire transaction is secure. 2. Mail Server (SMTP) is Offline Sometimes mail servers crash -- not often but I see it happen on WHM/cPanel and Plesk servers. Simply restarting the service from the control panel often fixes the issue. Your email client should return a connection error. Thunderbird error due to an incorrect hostname. The clue in this messa