I - Mission Critical Sensitive
Rules and Groups employed by this XCCDF Profile
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SRG-NET-000565
<GroupDescription></GroupDescription>Group -
The VPN gateway must use cryptographic algorithms approved by NSA to protect NSS when transporting classified traffic across an unclassified network.
<VulnDiscussion>Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The VPN gatewa...Rule High Severity -
SRG-NET-000580
<GroupDescription></GroupDescription>Group -
The VPN Gateway must validate certificates used for Transport Layer Security (TLS) functions by performing RFC 5280-compliant certification path validation.
<VulnDiscussion>A certificate's certification path is the path from the end entity certificate to a trusted root certification authority (CA)...Rule Medium Severity -
SRG-NET-000213
<GroupDescription></GroupDescription>Group -
The Remote Access VPN Gateway must terminate remote access network connections after an organization-defined time period.
<VulnDiscussion>This SRG requirement is in response to the DoD OIG Audit of Maintaining Cybersecurity in the Coronavirus Disease-2019 Telewor...Rule Medium Severity -
SRG-NET-000705
<GroupDescription></GroupDescription>Group -
The VPN Gateway must employ organization-defined controls by type of denial of service (DoS) to achieve the DoS objective.
<VulnDiscussion>DoS events may occur due to a variety of internal and external causes, such as an attack by an adversary or a lack of plannin...Rule Medium Severity -
SRG-NET-000715
<GroupDescription></GroupDescription>Group -
The VPN Gateway must implement physically or logically separate subnetworks to isolate organization-defined critical system components and functions.
<VulnDiscussion>Separating critical system components and functions from other noncritical system components and functions through separate s...Rule Medium Severity -
SRG-NET-000760
<GroupDescription></GroupDescription>Group -
The VPN Gateway must establish organization-defined alternate communications paths for system operations organizational command and control.
<VulnDiscussion>An incident, whether adversarial- or nonadversarial-based, can disrupt established communications paths used for system opera...Rule Medium Severity -
SRG-NET-000345
<GroupDescription></GroupDescription>Group -
The VPN Gateway 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-NET-000580
<GroupDescription></GroupDescription>Group -
The VPN Gateway must configure OCSP to ensure revoked user certificates are prohibited from establishing an allowed session.
<VulnDiscussion>Situations may arise in which the certificate issued by a Certificate Authority (CA) may need to be revoked before the lifeti...Rule Medium Severity -
SRG-NET-000580
<GroupDescription></GroupDescription>Group -
The VPN Gateway must configure OCSP to ensure revoked machine certificates are prohibited from establishing an allowed session.
<VulnDiscussion>Situations may arise in which the certificate issued by a Certificate Authority (CA) may need to be revoked before the lifeti...Rule Medium Severity -
SRG-NET-000355
<GroupDescription></GroupDescription>Group -
The VPN Gateway providing authentication intermediary services must only accept end entity certificates (user or machine) issued by DOD PKI or DOD-approved PKI Certification Authorities (CAs) for the establishment of VPN sessions.
<VulnDiscussion>Untrusted Certificate Authorities (CAs) can issue certificates, but they may be issued by organizations or individuals that s...Rule Medium Severity
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