II - Mission Support Classified
Rules and Groups employed by this XCCDF Profile
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SRG-OS-000480-GPOS-00227
Group -
The Oracle Linux operating system must be configured so that the SSH daemon uses privilege separation.
SSH daemon privilege separation causes the SSH process to drop root privileges when not needed, which would decrease the impact of software vulnerabilities in the unprivileged section.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 compression or only allows compression after successful authentication.
If compression is allowed in an SSH connection prior to authentication, vulnerabilities in the compression software could result in compromise of the system from an unauthenticated connection, pote...Rule Medium Severity -
SRG-OS-000355-GPOS-00143
Group -
The Oracle Linux operating system must, for networked systems, synchronize clocks with a server that is synchronized to one of the redundant United States Naval Observatory (USNO) time servers, a time server designated for the appropriate DoD network (NIPRNet/SIPRNet), and/or the Global Positioning System (GPS).
Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when condu...Rule Medium Severity -
SRG-OS-000420-GPOS-00186
Group -
The Oracle Linux operating system must protect against or limit the effects of Denial of Service (DoS) attacks by validating the operating system is implementing rate-limiting measures on impacted network interfaces.
DoS is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity. This require...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
Group -
The Oracle Linux operating system must enable an application firewall, if available.
Firewalls protect computers from network attacks by blocking or limiting access to open network ports. Application firewalls limit which applications are allowed to communicate over the network. S...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 logon.
Providing users with feedback on when account accesses last occurred facilitates user recognition and reporting of unauthorized account use.Rule Low Severity -
SRG-OS-000480-GPOS-00227
Group -
The Oracle Linux operating system must not contain .shosts files.
The .shosts files are used to configure host-based authentication for individual users or the system via SSH. Host-based authentication is not sufficient for preventing unauthorized access to the s...Rule High Severity -
SRG-OS-000480-GPOS-00227
Group -
The Oracle Linux operating system must not contain shosts.equiv files.
The shosts.equiv files are used to configure host-based authentication for the system via SSH. Host-based authentication is not sufficient for preventing unauthorized access to the system, as it do...Rule High Severity -
SRG-OS-000480-GPOS-00227
Group -
For Oracle Linux operating systems using DNS resolution, at least two name servers must be configured.
To provide availability for name resolution services, multiple redundant name servers are mandated. A failure in name resolution could lead to the failure of security functions requiring name resol...Rule Low Severity -
SRG-OS-000480-GPOS-00227
Group -
The Oracle Linux operating system must not forward Internet Protocol version 4 (IPv4) source-routed packets.
Source-routed packets allow the source of the packet to suggest that routers forward the packet along a different path than configured on the router, which can be used to bypass network security me...Rule Medium Severity
Node 2
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