III - Administrative Sensitive
Rules and Groups employed by this XCCDF Profile
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SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must display the date and time of the last successful account logon upon an SSH logon.
<VulnDiscussion>Providing users with feedback on when account accesses via SSH last occurred facilitates user recognition and reporting of un...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must not permit direct logons to the root account using remote access via SSH.
<VulnDiscussion>Even though the communications channel may be encrypted, an additional layer of security is gained by extending the policy of...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that the SSH daemon does not allow authentication using known hosts authentication.
<VulnDiscussion>Configuring this setting for the SSH daemon provides additional assurance that remote logon via SSH will require a password, ...Rule Medium Severity -
SRG-OS-000074-GPOS-00042
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that the SSH daemon is configured to only use the SSHv2 protocol.
<VulnDiscussion>SSHv1 is an insecure implementation of the SSH protocol and has many well-known vulnerability exploits. Exploits of the SSH d...Rule High Severity -
SRG-OS-000250-GPOS-00093
<GroupDescription></GroupDescription>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.
<VulnDiscussion>DoD information systems are required to use FIPS 140-2 approved cryptographic hash functions. The only SSHv2 hash algorithm m...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that the SSH public host key files have mode 0644 or less permissive.
<VulnDiscussion>If a public host key file is modified by an unauthorized user, the SSH service may be compromised.</VulnDiscussion><...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so the SSH private host key files have mode 0640 or less permissive.
<VulnDiscussion>If an unauthorized user obtains the private SSH host key file, the host could be impersonated.</VulnDiscussion><Fals...Rule Medium Severity -
SRG-OS-000364-GPOS-00151
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that the SSH daemon does not permit Generic Security Service Application Program Interface (GSSAPI) authentication unless needed.
<VulnDiscussion>GSSAPI authentication is used to provide additional authentication mechanisms to applications. Allowing GSSAPI authentication...Rule Medium Severity -
SRG-OS-000364-GPOS-00151
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that the SSH daemon does not permit Kerberos authentication unless needed.
<VulnDiscussion>Kerberos authentication for SSH is often implemented using Generic Security Service Application Program Interface (GSSAPI). I...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that the SSH daemon performs strict mode checking of home directory configuration files.
<VulnDiscussion>If other users have access to modify user-specific SSH configuration files, they may be able to log on to the system as anoth...Rule Medium Severity
Node 2
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