Red Hat Enterprise Linux 7 Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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The Red Hat Enterprise Linux operating system must be configured so that when passwords are changed the number of repeating consecutive characters must not be more than three characters.
Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resistin...Rule Medium Severity -
The Red Hat Enterprise Linux operating system must be configured to use the shadow file to store only encrypted representations of passwords.
Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily c...Rule Medium Severity -
The Red Hat Enterprise Linux operating system must be configured so that passwords for new users are restricted to a 24 hours/1 day minimum lifetime.
Enforcing a minimum password lifetime helps to prevent repeated password changes to defeat the password reuse or history enforcement requirement. If users are allowed to immediately and continually...Rule Medium Severity -
The Red Hat Enterprise Linux operating system must be configured so that passwords are a minimum of 15 characters in length.
The shorter the password, the lower the number of possible combinations that need to be tested before the password is compromised. Password complexity, or strength, is a measure of the effectivene...Rule Medium Severity -
The Red Hat Enterprise Linux operating system must not allow accounts configured with blank or null passwords.
If an account has an empty password, anyone could log on and run commands with the privileges of that account. Accounts with empty passwords should never be used in operational environments.Rule High Severity
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