I - Mission Critical Classified
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 sshd to disable X11 forwarding.
<VulnDiscussion>X11 is an older, insecure graphics forwarding protocol. It is not used by Photon and should be disabled as a general best pra...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure sshd to perform strict mode checking of home directory configuration files.
<VulnDiscussion>If other users have access to modify user-specific Secure Shell (SSH) configuration files, they may be able to log on to the ...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure sshd to disallow Kerberos authentication.
<VulnDiscussion>If Kerberos is enabled through Secure Shell (SSH), sshd provides a means of access to the system's Kerberos implementation. V...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure sshd to disallow authentication with an empty password.
<VulnDiscussion>Blank passwords are one of the first things an attacker checks for when probing a system. Even is the user somehow has a blan...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure sshd to disallow compression of the encrypted session stream.
<VulnDiscussion>If compression is allowed in a Secure Shell (SSH) connection prior to authentication, vulnerabilities in the compression soft...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure sshd to display the last login immediately after authentication.
<VulnDiscussion>Providing users with feedback on the last time they logged on via Secure Shell (SSH) facilitates user recognition and reporti...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure sshd to ignore user-specific trusted hosts lists.
<VulnDiscussion>Secure Shell (SSH) trust relationships enable trivial lateral spread after a host compromise and therefore must be explicitly...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure sshd to ignore user-specific "known_host" files.
<VulnDiscussion>Secure Shell (SSH) trust relationships enable trivial lateral spread after a host compromise and therefore must be explicitly...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure sshd 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 be configured so 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
Node 2
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