MySQL is an open-source relational database management system.

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42
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5answers
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Password security in databases - today still best practice? [duplicate]

Possible Duplicate: Which password hashing method should I use? There are a ton of great posts about password security in databases on stack overflow and on other sites and as I am ...
35
votes
6answers
4k views

Is SQL injection possible with LIMIT?

A friend of mine built a web application that I'm testing for fun. I noticed that he allows a user to set the limit of a certain query, and that limit is not sanitized. For example, I can choose any ...
34
votes
6answers
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Should I obscure database primary keys (IDs) in application front end?

I'm working on an application which allows a moderator to edit information of user. So, at the moment, I have URL's like http://www.example.com/user/1/edit http://www.example.com/user/2/edit I'm a ...
27
votes
4answers
4k views

Convince the company not to store credit card numbers in our webapp

The company I work for needs a system to perform monthly credit card charges to customer accounts. Customers will be able to update their credit card information from an online interface written in ...
25
votes
2answers
15k views

where to store a key for encryption

I am looking for a way to store a key used for password encryption. I am using a mysql db which would store a user name and an encrypted password that would be encrypted using ...
22
votes
2answers
5k views

MySQL Server Hardening

Following the hardening theme.... What are some best practices, recommendations, required reading for securing MySQL.
18
votes
3answers
4k views

MySQL OLD_PASSWORD cryptanalysis?

The password hash used for MySQL passwords prior to version 4.1 (now called OLD_PASSWORD()) seems like a very simple ad-hoc hash, without salts or iteration counts. See e.g an implementation in ...
17
votes
7answers
1k views

How to exploit the “PHP_MAGIC_QUOTES ON” vulnerability in order to cause max damage?

I've found a whole lot of SQL injection exploits in some systems I maintain. I know how to prevent the injection, but I would like to demonstrate to my CEO and CTO how dangerous it is if we don't have ...
15
votes
2answers
6k views

Multibyte character exploits - PHP/MySQL

Could someone please point me to a link with some information on multibyte character exploits for MySQL? A friend brought them to my attention, but I've not been able to find much information on the ...
14
votes
3answers
6k views

Is it possible to do SQL injection (HIGH Level) on Damn Vulnerable Web App?

I searched all over google to see how it would be possible to bypass the following (it's from the high level of security from DVWA): <?php if (isset($_GET['Submit'])) { // Retrieve data $id ...
13
votes
4answers
8k views

Is “Why Should You Avoid AES In MySQL?” true?

From a 2012 Smashing Magazine article quite a bold statement is made to avoid AES in MySQL itself. Or as they put it "Why Should You Avoid AES In MySQL?". However, if you search for SQL encryption, ...
12
votes
3answers
6k views

SQL injection can bypass login but not drop table

I've setup a test environment for running some SQL Injection against my code and learning how to defend against it. I can bypass the login form using the following in the password field: ' OR ...
12
votes
4answers
1k views

Encrypting IP addresses in a MySQL database

I'd like to encrypt IP addresses in my MySQL database, with the following constraints: Does not need to be resistant to attackers that can execute queries. Must be resistant to attackers that have ...
10
votes
3answers
1k views

Should IP addresses be validated to prevent SQL Injection?

In PHP I retrieve a user's IP address ($_SERVER['REMOTE_ADDR']) to use it in some MySQL queries, but I do not validate them to be true IP addresses. Should I validate user IP addresses before using ...
9
votes
2answers
1k views

Securing my web-server / website [closed]

Does anyone know of a comprehensive security guide about important basics / fundamentals which should be done to secure a web-server / website? A web link would do.
9
votes
4answers
1k views

Reasonable way to store encrypted passwords in a webapp's database, Linux

This question is generally similar to past questions asked here, but I haven't seen one the relates to Linux. Case at hand: a PHP web app has a MySQL backend. As part of its functionality it accesses ...
8
votes
5answers
2k views

Should I remotely store my salt? [duplicate]

When users register on my site, I want to store their username and hashed password in my database. When I hash that password, I'm going to salt it using PHP. The issue is, I don't want to store the ...
8
votes
3answers
2k views

SQL Injection if table structure/db structure not known

could an attacker who'd just found out that you're using mysql make an SQL Injection attack with only this information? If you don't know Any table/db name how come you can find it out? Is that even ...
8
votes
3answers
16k views

Is there any SQL injection for this PHP login example?

I want to write a login form, and I got one example from the web. I want to know, if there is any SQL injection for this code? If there is, what could the exploit's web form entry look like? This is ...
8
votes
3answers
3k views

Risk of configuring MySQL for remote access with a dynamic IP address?

I'm looking to make a MySQL database on a VPS, accessible to my home PC through cPanel. cPanel wants the domain name or IP address of the remote machine. However, with standard DSL, I have a dynamic ...
8
votes
2answers
12k views

SQL Injection: Drop All Tables

I used some vulnerability scanners to check a site of mine, and an instance of blind SQL injection was returned. However, when I try to exploit this vulnerability by entering the following into the ...
7
votes
6answers
1k views

Faster SQL injection prevention

I looked around everywhere and I can't find the answer to my question. I'm using the latest PHP for server-sided scripting and MySQL for my database. The character set is utf8mb4, if that makes a ...
7
votes
3answers
2k views

Beneficial to rename MySQL root user?

Title sums it up. I'm setting up a dedicated server as opposed to using shared hosting, and am wondering if it's more secure to change the MySQL root username. I've gone for a long and complex ...
7
votes
3answers
788 views

What would the potential abuses be for an HTTP API that accepted raw SQL?

I was wondering what some of the potential abuses could be for an HTTP API that accepted SQL queries and output results sets. The fact that this is the canonical definition of SQL injection is not ...
7
votes
3answers
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Is it a secure way to declare DB parameters in htaccess rather than in a PHP file?

It has been suggested in securing PHP article that using directive as below in htaccess is more secure than hardcoding it into your app: <VirtualHost ilia.ws> Include /home/ilia/sql.cnf ...
7
votes
1answer
2k views

Store user passwords in NoSQL database?

I am currently coding the backend of a website and I have not come across an article where this is discussed. I want to store all my application data in MongoDB but I'd like to split out my sensitive ...
6
votes
4answers
4k views

A customers site had a big mysql injection attack on it, just want to learn from it

I created an online store for a friend of mine. I created a system that shoots me an email any time there is a database error, that way if it is a bug in my code I can identify it and fix it. The ...
6
votes
2answers
3k views

What is the meaning of “something AND 1=0” command in SQL?

I have read somewhere that in SQL injection attacks the attackers use such keywords into application entry points. Whats the purpose of doing this?
6
votes
2answers
286 views

SQL injection across multiple tables

If a website has multiple web apps, each of them connected to different tables in a database and all of the apps are protected from SQL Injection except one; can that one web app be used to ...
6
votes
2answers
128 views

Security concerns with pre-pay system

I am looking at setting up a pre-pay system for the food retail industry. Retailers will be able to generate random 10 digit codes and supply these to customers to enter into an app to gain the value ...
6
votes
1answer
210 views

How important is a mysql password for localhost?

We can assume that if an attacker gained access to a web server running mysql that they would be capable of reading the scripts to determine the mysql password. If mysql only responds on localhost, ...
6
votes
2answers
906 views

Backdoors after SQL injection?

I just found an injection vulnerability on a live site of a client. It looks like this: $sql = "SELECT * FROM users_dl WHERE Username = '" . $Uname . "' AND Password = '" . $Pword . "'"; I ...
5
votes
5answers
1k views

What are the likely threats to a public-facing DB instance?

Quick intro: Small company, VERY limited resources. I pretty much do everything including take out the trash. We've been running an instance of MySQL internally for years and it's worked OK, but I ...
5
votes
6answers
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Mysql - two-way encryption of sensitive data (email addresses) outside of Apache, PHP and MySQL

We store user email addresses in our database, like many other websites. While we do take pride in the security measures in place, sometimes "just enough" is just not enough. We've begun looking into ...
5
votes
2answers
444 views

Identifying an ongoing exploit?

Recently I was contacted by a person saying that they had found a vulnerability in my site. They were able to prove it, by sending me a list of my own databases (some of which had been created but ...
5
votes
2answers
768 views

Should every output element be filtered, or just those which contain user-editable data? [duplicate]

I'm combing through a legacy app updating SQL to prevent Injections and XSS vulnerabilities. I know to apply PHP's htmlspecialchars() anything that is directly passed to a script and displayed on a ...
5
votes
4answers
6k views

How to get the output of a SQL injection?

This is just for learning purpose. I want to get all the usernames and passwords from a table in a MySQL server, where "magic quotes" have been disable. In the input for the username: I put something ...
5
votes
2answers
820 views

Could this login form be “hacked” to allow access?

We have this legacy website which has horrendous code in it. I have just been looking through the login form/code and can see un-sanitised sql queries. E.g. in a nutshell: $email=$_POST['email']; ...
5
votes
2answers
4k views

How do I protect user data at rest?

I want to encrypt the username, email, and password fields in the database AND encrypt user files at rest. How can I do this? I am aware of software such as Gazzang and since there is not cost ...
5
votes
1answer
2k views

My site just got hit with a SQL injection attack, how can I tell what they were doing?

So a page on my site (it's a PHP page that displays newsletter articles) was vulnerable to SQL injection and got hit. I discovered it because it was doing enough database queries to cause the CPU load ...
5
votes
2answers
658 views

mysql security logging

Is there any logging available that logs mysql connection attempts to the port, login attempts, and times succeeded with username, IP address and date time? Im trying to detect brute force attempts. ...
5
votes
3answers
127 views

Drupal Security & Two DBs

I use drupal for our site. It uses nodes that store data. We link lots of these nodes together to allow us to log jobs, customer info, invoices etc. These are linked via an addon drupal module. If I ...
5
votes
1answer
1k views

Is this admin area secure enough? V2

This is a response to my previous question, Is this admin area secure enough?. There were some very helpful answers there, for which I am very grateful. So I went back to the drawing board and here ...
5
votes
1answer
240 views

SQL injection not returning expected results

I've created a test site in order to learn about SQLi and then protect against it. I may be misunderstanding how it is supposed to behave but at present I'm not getting the results I expect. The ...
4
votes
6answers
10k views

Are there any tools for scanning for SQL injection vulnerabilities while logged in?

Some pages of my website were vulnerable to SQL injection. The injection worked only when the user was logged in. I have now fixed this problem, and now I want to make sure that no similar problems ...
4
votes
2answers
2k views

What is better salted hash or openssl encryption?

Im using php and I was looking to store passwords in a mysql database. I was wondering what would be safer to use a salted hash or openssl encryption? If i use a unique random generated salted hash ...
4
votes
3answers
1k views

SQL injection using letters and numbers?

I was wondering if it is at all possible for a hacker to perform an SQL injection attack using just letters and numbers. For example, let's take a look at this PHP code which uses regular expressions ...
4
votes
3answers
447 views

Is this admin area secure enough?

EDIT: Please view the revised question instead The admin area has special access to the database (modifying orders, etc). To help explain, I drew a diagram, so here is my process: Notes: I ...
4
votes
1answer
96 views

Should I take care of mysql credentials?

My mysql server is configured to not allow remote connection. Should I seriously care about mysql user and password in this case?
4
votes
3answers
654 views

Is it secure to centralize database information?

I would know if it is secure to centralize database information into one file like this : db_infos.php: $server = "localhost"; $user = "root"; $password = "1234"; $database = "foo"; $table = "bar"; ...