II - Mission Support Classified
Rules and Groups employed by this XCCDF Profile
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SRG-OS-000471-GPOS-00216
<GroupDescription></GroupDescription>Group -
The Photon operating system must be configured to audit the loading and unloading of dynamic kernel modules.
<VulnDiscussion>Without generating audit records that are specific to the security and mission needs of the organization, it would be difficu...Rule Medium Severity -
SRG-OS-000478-GPOS-00223
<GroupDescription></GroupDescription>Group -
The Photon operating system must implement NIST FIPS-validated cryptography for the following: to provision digital signatures, to generate cryptographic hashes, and to protect unclassified information requiring confidentiality and cryptographic protection in accordance with applicable federal laws, Executive Orders, directives, policies, regulations, and standards.
<VulnDiscussion>Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The operating ...Rule High Severity -
SRG-OS-000480-GPOS-00225
<GroupDescription></GroupDescription>Group -
The Photon operating system must prevent the use of dictionary words for passwords.
<VulnDiscussion>If the operating system allows the user to select passwords based on dictionary words, then this increases the chances of pas...Rule Medium Severity -
SRG-OS-000480-GPOS-00226
<GroupDescription></GroupDescription>Group -
The Photon operating system must enforce a delay of at least four seconds between logon prompts following a failed logon attempt in login.defs.
<VulnDiscussion>Limiting the number of logon attempts over a certain time interval reduces the chances that an unauthorized user may gain acc...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must ensure audit events are flushed to disk at proper intervals.
<VulnDiscussion>Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events r...Rule Medium Severity -
SRG-OS-000480-GPOS-00228
<GroupDescription></GroupDescription>Group -
The Photon operating system must define default permissions for all authenticated users in such a way that the user can only read and modify their own files.
<VulnDiscussion>Setting the most restrictive default permissions ensures that when new accounts are created they do not have unnecessary acce...Rule Medium Severity -
SRG-OS-000480-GPOS-00229
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure Secure Shell (SSH) to disallow HostbasedAuthentication.
<VulnDiscussion>SSH trust relationships enable trivial lateral spread after a host compromise and therefore must be explicitly disabled.</...Rule High Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
The Photon operating system must be configured to use the pam_faillock.so module.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
The Photon operating system must prevent leaking information of the existence of a user account.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
The Photon operating system must audit logon attempts for unknown users.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
The Photon operating system must include root when automatically locking an account until the locked account is released by an administrator when three unsuccessful logon attempts occur during a 15-minute time period.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
The Photon operating system must persist lockouts between system reboots.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000069-GPOS-00037
<GroupDescription></GroupDescription>Group -
The Photon operating system must be configured to use the pam_pwquality.so module.
<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, ...Rule Medium Severity -
SRG-OS-000366-GPOS-00153
<GroupDescription></GroupDescription>Group -
The Photon operating system TDNF package management tool must cryptographically verify the authenticity of all software packages during installation for all repos.
<VulnDiscussion>Installation of any nontrusted software, patches, service packs, device drivers, or operating system components can significa...Rule High Severity -
SRG-OS-000032-GPOS-00013
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure the Secure Shell (SSH) SyslogFacility.
<VulnDiscussion>Automated monitoring of remote access sessions allows organizations to detect cyberattacks and ensure ongoing compliance with...Rule Medium Severity -
SRG-OS-000032-GPOS-00013
<GroupDescription></GroupDescription>Group -
The Photon operating system must enable Secure Shell (SSH) authentication logging.
<VulnDiscussion>Automated monitoring of remote access sessions allows organizations to detect cyberattacks and ensure ongoing compliance with...Rule Medium Severity -
SRG-OS-000163-GPOS-00072
<GroupDescription></GroupDescription>Group -
The Photon operating system must terminate idle Secure Shell (SSH) sessions.
<VulnDiscussion>Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take c...Rule Medium Severity -
SRG-OS-000239-GPOS-00089
<GroupDescription></GroupDescription>Group -
The Photon operating system must audit all account modifications.
<VulnDiscussion>Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing ...Rule Medium Severity -
SRG-OS-000480-GPOS-00226
<GroupDescription></GroupDescription>Group -
The Photon operating system must enforce a delay of at least four seconds between logon prompts following a failed logon attempt.
<VulnDiscussion>Limiting the number of logon attempts over a certain time interval reduces the chances that an unauthorized user may gain acc...Rule Medium Severity -
SRG-OS-000480-GPOS-00229
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure Secure Shell (SSH) 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 if the user somehow has a blan...Rule High Severity -
SRG-OS-000480-GPOS-00229
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure Secure Shell (SSH) to disable user environment processing.
<VulnDiscussion>Enabling user environment processing may enable users to bypass access restrictions in some configurations and must therefore...Rule High Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must create a home directory for all new local interactive user accounts.
<VulnDiscussion>If local interactive users are not assigned a valid home directory, there is no place for the storage and control of files th...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must disable the debug-shell service.
<VulnDiscussion>The debug-shell service is intended to diagnose systemd related boot issues with various systemctl commands. Once enabled and...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure Secure Shell (SSH) to disallow Generic Security Service Application Program Interface (GSSAPI) authentication.
<VulnDiscussion>GSSAPI authentication is used to provide additional authentication mechanisms to applications. Allowing GSSAPI authentication...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Photon operating system must configure Secure Shell (SSH) 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
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