II - Mission Support Classified
Rules and Groups employed by this XCCDF Profile
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SRG-OS-000362
<GroupDescription></GroupDescription>Group -
The operating system must prohibit user installation of system software without explicit privileged status.
<VulnDiscussion>Allowing regular users to install software, without explicit privileges, creates the risk that untested or potentially malici...Rule Medium Severity -
SRG-OS-000363
<GroupDescription></GroupDescription>Group -
The operating system must notify designated personnel if baseline configurations are changed in an unauthorized manner.
<VulnDiscussion>Unauthorized changes to the baseline configuration could make the system vulnerable to various attacks or allow unauthorized ...Rule Medium Severity -
SRG-OS-000364
<GroupDescription></GroupDescription>Group -
The operating system must enforce access restrictions.
<VulnDiscussion>Failure to provide logical access restrictions associated with changes to system configuration may have significant effects o...Rule Medium Severity -
SRG-OS-000365
<GroupDescription></GroupDescription>Group -
The operating system must audit the enforcement actions used to restrict access associated with changes to the system.
<VulnDiscussion>Without auditing the enforcement of access restrictions against changes to the application configuration, it will be difficul...Rule Medium Severity -
SRG-OS-000366
<GroupDescription></GroupDescription>Group -
The operating system must prevent the installation of patches, service packs, device drivers, or operating system components without verification they have been digitally signed using a certificate that is recognized and approved by the organization.
<VulnDiscussion>Changes to any software components can have significant effects on the overall security of the operating system. This require...Rule High Severity -
SRG-OS-000368
<GroupDescription></GroupDescription>Group -
The operating system must prevent program execution in accordance with local policies regarding software program usage and restrictions and/or rules authorizing the terms and conditions of software program usage.
<VulnDiscussion>Control of program execution is a mechanism used to prevent execution of unauthorized programs. Some operating systems may pr...Rule Medium Severity -
SRG-OS-000370
<GroupDescription></GroupDescription>Group -
The operating system must employ a deny-all, permit-by-exception policy to allow the execution of authorized software programs.
<VulnDiscussion>Utilizing a whitelist provides a configuration management method for allowing the execution of only authorized software. Usin...Rule Medium Severity -
SRG-OS-000373
<GroupDescription></GroupDescription>Group -
The operating system must require users to re-authenticate for privilege escalation.
<VulnDiscussion>Without re-authentication, users may access resources or perform tasks for which they do not have authorization. When opera...Rule Medium Severity -
SRG-OS-000373
<GroupDescription></GroupDescription>Group -
The operating system must require users to re-authenticate when changing roles.
<VulnDiscussion>Without re-authentication, users may access resources or perform tasks for which they do not have authorization. When opera...Rule Medium Severity -
SRG-OS-000373
<GroupDescription></GroupDescription>Group -
The operating system must require users to re-authenticate when changing authenticators.
<VulnDiscussion>Without re-authentication, users may access resources or perform tasks for which they do not have authorization. When opera...Rule Medium Severity -
SRG-OS-000374
<GroupDescription></GroupDescription>Group -
The operating system must require devices to re-authenticate when changing authenticators.
<VulnDiscussion>Without re-authentication, devices may access resources or perform tasks for which they do not have authorization. When ope...Rule Medium Severity -
SRG-OS-000375
<GroupDescription></GroupDescription>Group -
The operating system must implement multifactor authentication for remote access to privileged accounts in such a way that one of the factors is provided by a device separate from the system gaining access.
<VulnDiscussion>Using an authentication device, such as a CAC or token that is separate from the information system, ensures that even if the...Rule Medium Severity -
SRG-OS-000376
<GroupDescription></GroupDescription>Group -
The operating system must accept Personal Identity Verification (PIV) credentials.
<VulnDiscussion>The use of PIV credentials facilitates standardization and reduces the risk of unauthorized access. DoD has mandated the use...Rule Medium Severity -
SRG-OS-000377
<GroupDescription></GroupDescription>Group -
The operating system must electronically verify Personal Identity Verification (PIV) credentials.
<VulnDiscussion>The use of PIV credentials facilitates standardization and reduces the risk of unauthorized access. DoD has mandated the use...Rule Medium Severity -
SRG-OS-000378
<GroupDescription></GroupDescription>Group -
The operating system must authenticate peripherals before establishing a connection.
<VulnDiscussion>Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. ...Rule Medium Severity -
SRG-OS-000379
<GroupDescription></GroupDescription>Group -
The operating system must authenticate all endpoint devices before establishing a local, remote, and/or network connection using bidirectional authentication that is cryptographically based.
<VulnDiscussion>Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. B...Rule Medium Severity -
SRG-OS-000380
<GroupDescription></GroupDescription>Group -
The operating system must allow the use of a temporary password for system logons with an immediate change to a permanent password.
<VulnDiscussion>Without providing this capability, an account may be created without a password. Non-repudiation cannot be guaranteed once an...Rule Medium Severity -
SRG-OS-000383
<GroupDescription></GroupDescription>Group -
The operating system must prohibit the use of cached authenticators after one day.
<VulnDiscussion>If cached authentication information is out-of-date, the validity of the authentication information may be questionable.</...Rule Medium Severity -
SRG-OS-000384
<GroupDescription></GroupDescription>Group -
The operating system, for PKI-based authentication, must implement a local cache of revocation data to support path discovery and validation in case of the inability to access revocation information via the network.
<VulnDiscussion>Without configuring a local cache of revocation data, there is the potential to allow access to users who are no longer autho...Rule Medium Severity -
SRG-OS-000392
<GroupDescription></GroupDescription>Group -
The operating system must audit all activities performed during nonlocal maintenance and diagnostic sessions.
<VulnDiscussion>If events associated with nonlocal administrative access or diagnostic sessions are not logged, a major tool for assessing an...Rule Medium Severity -
SRG-OS-000393
<GroupDescription></GroupDescription>Group -
The operating system must implement cryptographic mechanisms to protect the integrity of nonlocal maintenance and diagnostic communications, when used for nonlocal maintenance sessions.
<VulnDiscussion>Privileged access contains control and configuration information and is particularly sensitive, so additional protections are...Rule High Severity -
SRG-OS-000394
<GroupDescription></GroupDescription>Group -
The operating system must implement cryptographic mechanisms to protect the confidentiality of nonlocal maintenance and diagnostic communications, when used for nonlocal maintenance sessions.
<VulnDiscussion>Privileged access contains control and configuration information and is particularly sensitive, so additional protections are...Rule High Severity -
SRG-OS-000395
<GroupDescription></GroupDescription>Group -
The operating system must verify remote disconnection at the termination of nonlocal maintenance and diagnostic sessions, when used for nonlocal maintenance sessions.
<VulnDiscussion>If the remote connection is not closed and verified as closed, the session may remain open and be exploited by an attacker; t...Rule Medium Severity -
SRG-OS-000396
<GroupDescription></GroupDescription>Group -
The operating system must implement NSA-approved cryptography to protect classified information 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-000403
<GroupDescription></GroupDescription>Group -
The operating system must only allow the use of DoD PKI-established certificate authorities for authentication in the establishment of protected sessions to the operating system.
<VulnDiscussion>Untrusted Certificate Authorities (CA) can issue certificates, but they may be issued by organizations or individuals that se...Rule Medium Severity
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