III - Administrative Public
Rules and Groups employed by this XCCDF Profile
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SRG-OS-000004-GPOS-00004
Group -
The Oracle Linux operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/security/opasswd.
Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or...Rule Medium Severity -
SRG-OS-000466-GPOS-00210
Group -
The Oracle Linux operating system must audit all uses of the unlink, unlinkat, rename, renameat, and rmdir syscalls.
If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromi...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
Group -
The Oracle Linux operating system must send rsyslog output to a log aggregation server.
Sending rsyslog output to another system ensures that the logs cannot be removed or modified in the event that the system is compromised or has a hardware failure.Rule Medium Severity -
SRG-OS-000480-GPOS-00227
Group -
The Oracle Linux operating system must be configured so that the rsyslog daemon does not accept log messages from other servers unless the server is being used for log aggregation.
Unintentionally running a rsyslog server accepting remote messages puts the system at increased risk. Malicious rsyslog messages sent to the server could exploit vulnerabilities in the server softw...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
Group -
The Oracle Linux operating system must use a virus scan program.
Virus scanning software can be used to protect a system from penetration from computer viruses and to limit their spread through intermediate systems. The virus scanning software should be configu...Rule High Severity -
SRG-OS-000027-GPOS-00008
Group -
The Oracle Linux operating system must limit the number of concurrent sessions to 10 for all accounts and/or account types.
Operating system management includes the ability to control the number of users and user sessions that utilize an operating system. Limiting the number of allowed users and sessions per user is hel...Rule Low Severity -
SRG-OS-000096-GPOS-00050
Group -
The Oracle Linux operating system must be configured to prohibit or restrict the use of functions, ports, protocols, and/or services, as defined in the Ports, Protocols, and Services Management Component Local Service Assessment (PPSM CLSA) and vulnerability assessments.
In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable...Rule Medium Severity -
SRG-OS-000033-GPOS-00014
Group -
The Oracle Linux 7 operating system must implement DoD-approved encryption to protect the confidentiality of SSH connections.
Unapproved mechanisms for authentication to the cryptographic module are not verified, and therefore cannot be relied upon to provide confidentiality or integrity, resulting in the compromise of Do...Rule Medium Severity -
SRG-OS-000163-GPOS-00072
Group -
The Oracle Linux operating system must be configured so that all network connections associated with a communication session are terminated at the end of the session or after 15 minutes of inactivity from the user at a command prompt, except to fulfill documented and validated mission requirements.
Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port th...Rule Medium Severity -
SRG-OS-000023-GPOS-00006
Group -
The Oracle Linux operating system must display the Standard Mandatory DoD Notice and Consent Banner immediately prior to, or as part of, remote access logon prompts.
Display of a standardized and approved use notification before granting access to the publicly accessible operating system ensures privacy and security notification verbiage used is consistent with...Rule Medium Severity -
SRG-OS-000250-GPOS-00093
Group -
The Oracle Linux operating system must implement cryptography to protect the integrity of Lightweight Directory Access Protocol (LDAP) authentication communications.
Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Cryptographic mechanisms used for protecting the integrity of information include, ...Rule Medium Severity -
SRG-OS-000250-GPOS-00093
Group -
The Oracle Linux operating system must implement cryptography to protect the integrity of Lightweight Directory Access Protocol (LDAP) communications.
Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Cryptographic mechanisms used for protecting the integrity of information include, ...Rule Medium Severity -
SRG-OS-000250-GPOS-00093
Group -
The Oracle Linux operating system must implement cryptography to protect the integrity of Lightweight Directory Access Protocol (LDAP) communications.
Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Cryptographic mechanisms used for protecting the integrity of information include, ...Rule Medium Severity -
SRG-OS-000433-GPOS-00193
Group -
The Oracle Linux operating system must implement virtual address space randomization.
Address space layout randomization (ASLR) makes it more difficult for an attacker to predict the location of attack code introduced into a process's address space during an attempt at exploitation....Rule Medium Severity -
SRG-OS-000423-GPOS-00187
Group -
The Oracle Linux operating system must be configured so that all networked systems have SSH installed.
Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected communications can be intercepted and either read or altered. This requirem...Rule Medium Severity -
SRG-OS-000423-GPOS-00187
Group -
The Oracle Linux operating system must be configured so that all networked systems use SSH for confidentiality and integrity of transmitted and received information as well as information during preparation for transmission.
Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected communications can be intercepted and either read or altered. This requirem...Rule Medium Severity -
SRG-OS-000163-GPOS-00072
Group -
The Oracle Linux operating system must be configured so that all network connections associated with SSH traffic are terminated after 10 minutes of becoming unresponsive.
Terminating an unresponsive SSH session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or con...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
Group -
The Oracle Linux operating system must be configured so that the SSH daemon does not allow authentication using RSA rhosts authentication.
Configuring this setting for the SSH daemon provides additional assurance that remote logon via SSH will require a password, even in the event of misconfiguration elsewhere.Rule Medium Severity -
SRG-OS-000163-GPOS-00072
Group -
The Oracle Linux operating system must be configured so that all network connections associated with SSH traffic terminate after becoming unresponsive.
Terminating an unresponsive SSH session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or con...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
Group -
The Oracle Linux operating system must be configured so that the SSH daemon does not allow authentication using rhosts authentication.
Configuring this setting for the SSH daemon provides additional assurance that remote logon via SSH will require a password, even in the event of misconfiguration elsewhere.Rule Medium Severity -
SRG-OS-000480-GPOS-00227
Group -
The Oracle Linux operating system must display the date and time of the last successful account logon upon an SSH logon.
Providing users with feedback on when account accesses via SSH last occurred facilitates user recognition and reporting of unauthorized account use.Rule Medium Severity -
SRG-OS-000480-GPOS-00227
Group -
The Oracle Linux operating system must not permit direct logons to the root account using remote access via SSH.
Even though the communications channel may be encrypted, an additional layer of security is gained by extending the policy of not logging on directly as root. In addition, logging on with a user-sp...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
Group -
The Oracle Linux operating system must be configured so that the SSH daemon does not allow authentication using known hosts authentication.
Configuring this setting for the SSH daemon provides additional assurance that remote logon via SSH will require a password, even in the event of misconfiguration elsewhere.Rule Medium Severity -
SRG-OS-000074-GPOS-00042
Group -
The Oracle Linux operating system must be configured so that the SSH daemon is configured to only use the SSHv2 protocol.
SSHv1 is an insecure implementation of the SSH protocol and has many well-known vulnerability exploits. Exploits of the SSH daemon could provide immediate root access to the system. Satisfies: SRG...Rule High Severity -
SRG-OS-000250-GPOS-00093
Group -
The Oracle Linux operating system must be configured so that the SSH daemon is configured to only use Message Authentication Codes (MACs) employing FIPS 140-2 approved cryptographic hash algorithms.
DoD information systems are required to use FIPS 140-2 approved cryptographic hash functions. The only SSHv2 hash algorithm meeting this requirement is SHA. The system will attempt to use the firs...Rule Medium Severity
Node 2
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