Oracle Linux 7 Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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The Oracle Linux operating system must be configured so that all local interactive users have a home directory assigned and defined in the /etc/passwd file.
If local interactive users are not assigned a valid home directory, there is no place for the storage and control of files they should own. In addition, if a local interactive user has a home direc...Rule Medium Severity -
The Oracle Linux operating system must be configured so that all files and directories contained in local interactive user home directories have a mode of 0750 or less permissive.
If a local interactive user files have excessive permissions, unintended users may be able to access or modify them.Rule Medium Severity -
The Oracle Linux operating system must be configured so that all local interactive user initialization files executable search paths contain only paths that resolve to the users home directory.
The executable search path (typically the PATH environment variable) contains a list of directories for the shell to search to find executables. If this path includes the current working directory ...Rule Medium Severity -
The Oracle Linux operating system must be configured so that all system device files are correctly labeled to prevent unauthorized modification.
If an unauthorized or modified device is allowed to exist on the system, there is the possibility the system may perform unintended or unauthorized operations.Rule Medium Severity -
The Oracle Linux operating system must mount /dev/shm with secure options.
The "noexec" mount option causes the system to not execute binary files. This option must be used for mounting any file system not containing approved binary files, as they may be incompatible. Exe...Rule Low Severity -
The Oracle Linux operating system must be configured so that the cron.allow file, if it exists, is owned by root.
If the owner of the "cron.allow" file is not set to root, the possibility exists for an unauthorized user to view or to edit sensitive information.Rule Medium Severity -
The Oracle Linux operating system must be configured so that a separate file system is used for user home directories (such as /home or an equivalent).
The use of separate file systems for different paths can protect the system from failures resulting from a file system becoming full or failing.Rule Low Severity -
The Oracle Linux operating system must implement NIST FIPS-validated cryptography for the following: to provision digital signatures, to generate cryptographic hashes, and to protect data requiring data-at-rest protections in accordance with applicable federal laws, Executive Orders, directives, policies, regulations, and standards.
Use of weak or untested encryption algorithms undermines the purposes of using encryption to protect data. The operating system must implement cryptographic modules that adhere to the higher standa...Rule High Severity -
The Oracle Linux operating system must be configured so that auditing is configured to produce records containing information to establish what type of events occurred, where the events occurred, the source of the events, and the outcome of the events. These audit records must also identify individual identities of group account users.
Without establishing what type of events occurred, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. Audit record content that may be nec...Rule Medium Severity -
The Oracle Linux operating system must shut down upon audit processing failure, unless availability is an overriding concern. If availability is a concern, the system must alert the designated staff (System Administrator [SA] and Information System Security Officer [ISSO] at a minimum) in the event of an audit processing failure.
It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required. Without this notification, the security personnel may be unaware of an ...Rule Medium Severity
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