II - Mission Support Sensitive
Rules and Groups employed by this XCCDF Profile
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SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure Secure Shell (SSH) to ignore user-specific known_host files.
<VulnDiscussion>SSH trust relationships enable trivial lateral spread after a host compromise and therefore must be explicitly disabled. Indi...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure Secure Shell (SSH) to limit the number of allowed login attempts per connection.
<VulnDiscussion>By setting the login attempt limit to a low value, an attacker will be forced to reconnect frequently, which severely limits ...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure Secure Shell (SSH) to restrict AllowTcpForwarding.
<VulnDiscussion>While enabling TCP tunnels is a valuable function of sshd, this feature is not appropriate for use on single purpose applianc...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure Secure Shell (SSH) to restrict LoginGraceTime.
<VulnDiscussion>By default, SSH unauthenticated connections are left open for two minutes before being closed. This setting is too permissive...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must be configured so that the x86 Ctrl-Alt-Delete key sequence is disabled on the command line.
<VulnDiscussion>When the Ctrl-Alt-Del target is enabled, a locally logged-on user who presses Ctrl-Alt-Delete, when at the console, can reboo...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must not forward IPv4 or IPv6 source-routed packets.
<VulnDiscussion>Source routing is an Internet Protocol mechanism that allows an IP packet to carry information, a list of addresses, that tel...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must not respond to IPv4 Internet Control Message Protocol (ICMP) echoes sent to a broadcast address.
<VulnDiscussion>Responding to broadcast (ICMP) echoes facilitates network mapping and provides a vector for amplification attacks.</VulnDi...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must prevent IPv4 Internet Control Message Protocol (ICMP) redirect messages from being accepted.
<VulnDiscussion>ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. Thes...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must prevent IPv4 Internet Control Message Protocol (ICMP) secure redirect messages from being accepted.
<VulnDiscussion>ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. Thes...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must not send IPv4 Internet Control Message Protocol (ICMP) redirects.
<VulnDiscussion>ICMP redirect messages are used by routers to inform hosts that a more direct route exists for a particular destination. Thes...Rule Medium Severity
Node 2
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