![]() This worked for me in the standard Ubuntu 14.04 64 bits installation. It seems that this solution is not safe and not recommended. Concealing and obscuring the name of the superuser has advantages.ĮDIT: Warning: Please, read the answer posted by Evan Carroll. By keeping this disabled, you remove the risk of a brute force attack through a named super-user.And, that means that you could normally wreck havoc anyway. This normally means in order to log in as postgres which is the PostgreSQL equivalent of SQL Server's SA, you have to have write-access to the underlying data files. It's normally not password protected and delegates to the host operating system.You're supposed to have root to get to authenticate as postgres. No one is supposed to "log in" to the operating system as postgres. I suggest NOT modifying the postgres user. Or, $ grep "port =" /etc/postgresql/*/main/nf If you don't know the port, you can always get it by running the following, as the postgres user, SHOW port Then you can login, $ psql -h localhost -d mydatabase -U myuser -p Using the SQL administration commands, and connecting with a password over TCP $ sudo -u postgres psql postgresĪnd, then in the psql shell CREATE ROLE myuser LOGIN PASSWORD 'mypass' ĬREATE DATABASE mydatabase WITH OWNER = myuser Using createuser and createdb, $ sudo -u postgres createuser -superuser $USER Both require creating a user and a database. template1 is the admin database that is here from the start. Note that if you do a mere psql, it will fail since it will try to connect you to a default database having the same name as you (i.e. Restart (like in step 4), and check that you can login without -U postgres: ![]() The really important ones are -P -E, so that you're asked to type the password that will be encrypted, and -d so that you can do a createdb.īeware of passwords: it will first ask you twice the new password (for the new user), repeated, and then once the postgres password (the one specified on step 2).Īgain, edit the pg_hba.conf file (see step 3 above), and change "peer" to "md5" on the line concerning "all" other users: The options tell postgresql to create a user that can login, create databases, create new roles, is a superuser, and will have an encrypted password. Sudo createuser -U postgres -d -e -E -l -P -r -s (Here you can check if it worked with psql -U postgres).Ĭreate a user having the same name as you (to find it, you can type whoami): Also, you can use Nano or other editor instead of VIM. To know what version of postgresql you are running, look for the version folder under /etc/postgresql. ![]() Sudo vim /etc/postgresql/9.1/main/pg_hba.confĪnd change "peer" to "md5" on the line concerning postgres: Set the password for user postgres, then exit psql (Ctrl-D):ĪLTER USER postgres with encrypted password 'xxxxxxx' ![]() Here's what worked for postgresql-9.1 on Xubuntu 12.04.1 LTS.Ĭonnect to the default database with user postgres: The risk of an attacker exploiting this feature to obtain additional access toĬompany information.The other answers were not completely satisfying to me. When a user subverts the original intent of your SQL Similar to creating a user, creating a database is very easy:: postgres create database amit There are several other options. SQL injection attacks are malicious attacks in which data is “injected” into Statements, this is known as a SQL injection attack. Hackers use this technique to gain access to business data and personal Your SQL query using certain destructive phrases or unescaped parameters. Of the most recent examples of a SQLi attack is the Information, as well as modify or delete the content within your database. Which wiped out nearly 4,000 unsecured databases in July 2020. Typically, attacks occur through a web interface, such as a web page orĪpplication, that allows users to search the database or log in to an account. “classic” or “simple” attacks), inferential (or “blind”), and out-of-band SQL injection attacks fall under three main categories: In-band (also known as Only to the contents of your database, but to the integrity and reputation of Needless to say, the fallout from these kinds of attacks can be devastating, not If inputs on your webĪpplication are not properly validated and escaped, attackers can use theseįeatures to alter your database with destructive phrases such as DROP TABLE,ĭouble-dashed sequence ‘-’, or a semicolon, or download your entire Many times this is done through automated scripts. In a simple, or in-band attack, commands are sent to the database in order toĮxtract content and return results directly to the end user.
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