Security analysis of Oracle default account password

Oracle database is a popular relational database management system. Many companies and organizations choose to use Oracle to store and manage their important data. In the Oracle database, there are some default accounts and passwords preset by the system, such as sys, system, etc. In daily database management and operation and maintenance work, administrators need to pay attention to the security of these default account passwords, because these accounts have higher permissions and may cause serious security problems once they are maliciously exploited. This article will analyze the security of Oracle's default account password and give some specific code examples to help administrators strengthen database security.

First, let us take a look at some common default accounts and passwords in Oracle databases:

1. sys account: The sys account is the super user of the Oracle database and has the highest authority. The default password is set by the administrator during the installation process. If it has not been modified, the default password may be "change_on_install" or "manager", etc.
2. System account: The system account is also the administrative user of the Oracle database and has higher permissions. The default password is usually set by the administrator during the installation process, and the default may be "manager" etc.
3. scott account: The scott account is a classic example account used for demonstration and testing purposes. The default password is "TIGER".

These default account passwords have low security and are vulnerable to malicious attacks. In order to strengthen the security of the database, administrators should promptly change these default passwords and set passwords that are complex and difficult to guess. In addition, administrators can disable or limit access to these default accounts and enable them only when necessary.

The following are some specific code examples to demonstrate how to modify the default account password in the Oracle database:

-- 修改sys账号密码
ALTER USER sys IDENTIFIED BY new_password;

-- 修改system账号密码
ALTER USER system IDENTIFIED BY new_password;

-- 修改scott账号密码
ALTER USER scott IDENTIFIED BY new_password;

In the above example, the ALTER USER statement is used to modify sys, system and The password for the scott account is new_password. The administrator can set a more complex and secure password according to the actual situation.

In addition to changing the password of the default account, administrators should also pay attention to other measures to ensure database security, such as limiting the number of account logins, setting password complexity policies, and backing up data regularly. In addition, timely application of security patches officially released by Oracle is also an important step to ensure database security.

In short, the security of the default account and password in the Oracle database is crucial, and administrators should pay attention to it and take appropriate measures to strengthen the security of the database. By changing the default password, restricting permissions, configuring security policies and other measures, you can effectively avoid potential security risks and protect the security of important data in the database. I hope this article will be helpful to administrators in strengthening Oracle database security.

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