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II - Mission Support Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-OS-000076-GPOS-00044

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  • SLEM 5 must employ user passwords with a maximum lifetime of 60 days.

    Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. If SLEM 5 does not limit the lifetime of passwords and force users to change th...
    Rule Medium Severity
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  • SRG-OS-000077-GPOS-00045

    Group
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  • SLEM 5 must employ a password history file.

    Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. If the information system or application allows the user...
    Rule Medium Severity
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  • SRG-OS-000073-GPOS-00041

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  • SLEM 5 must employ FIPS 140-2/140-3-approved cryptographic hashing algorithms for system authentication.

    The system must use a strong hashing algorithm to store the password. The system must use a sufficient number of hashing rounds to ensure the required level of entropy. Passwords need to be protec...
    Rule High Severity
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  • SRG-OS-000073-GPOS-00041

    Group
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  • SLEM 5 shadow password suite must be configured to use a sufficient number of hashing rounds.

    The system must use a strong hashing algorithm to store the password. The system must use a sufficient number of hashing rounds to ensure the required level of entropy. Passwords need to be protec...
    Rule High Severity
    Show

  • SRG-OS-000120-GPOS-00061

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  • SLEM 5 must employ FIPS 140-2/140-3 approved cryptographic hashing algorithm for system authentication (login.defs).

    Unapproved mechanisms that are used for authentication to the cryptographic module are not verified and therefore cannot be relied on to provide confidentiality or integrity, and DOD data may be co...
    Rule Medium Severity
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  • SRG-OS-000075-GPOS-00043

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  • SLEM 5 must be configured to create or update passwords with a minimum lifetime of 24 hours (one day).

    Enforcing a minimum password lifetime helps prevent repeated password changes to defeat the password reuse or history enforcement requirement. If users are allowed to immediately and continually ch...
    Rule Medium Severity
    Show

  • SRG-OS-000076-GPOS-00044

    Group
    Show

  • SLEM 5 must be configured to create or update passwords with a maximum lifetime of 60 days.

    Any password, no matter how complex, can eventually be cracked. Therefore, passwords need to be changed periodically. If SLEM 5 does not limit the lifetime of passwords and force users to change th...
    Rule Medium Severity
    Show

  • SRG-OS-000375-GPOS-00160

    Group
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  • SLEM 5 must have the packages required for multifactor authentication to be installed.

    Using an authentication device, such as a Common Access Card (CAC) or token separate from the information system, ensures that even if the information system is compromised, that compromise will no...
    Rule Medium Severity
    Show

  • SRG-OS-000068-GPOS-00036

    Group
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  • SLEM 5 must implement multifactor authentication for access to privileged accounts via pluggable authentication modules (PAM).

    Using an authentication device, such as a Common Access Card (CAC) or token that is separate from the information system, ensures that even if the information system is compromised, that compromise...
    Rule Medium Severity
    Show

  • SRG-OS-000375-GPOS-00160

    Group
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  • SLEM 5 must implement certificate status checking for multifactor authentication.

    Using an authentication device, such as a Common Access Card (CAC) or token separate from the information system, ensures credentials stored on the authentication device will not be affected if the...
    Rule Medium Severity
    Show

  • SRG-OS-000383-GPOS-00166

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  • If Network Security Services (NSS) is being used by SLEM 5 it must prohibit the use of cached authentications after one day.

    If cached authentication information is out of date, the validity of the authentication information may be questionable.
    Rule Medium Severity
    Show

  • SRG-OS-000383-GPOS-00166

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  • SLEM 5 must configure the Linux Pluggable Authentication Modules (PAM) to prohibit the use of cached offline authentications after one day.

    If cached authentication information is out of date, the validity of the authentication information may be questionable.
    Rule Medium Severity
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  • SRG-OS-000066-GPOS-00034

    Group
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  • SLEM 5, for PKI-based authentication, must validate certificates by constructing a certification path (which includes status information) to an accepted trust anchor.

    Without path validation, an informed trust decision by the relying party cannot be made when presented with any certificate not already explicitly trusted. A trust anchor is an authoritative entit...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • SLEM 5 must be configured to not overwrite Pluggable Authentication Modules (PAM) configuration on package changes.

    The "pam-config" command line utility automatically generates a system PAM configuration as packages are installed, updated, or removed from the system. "pam-config" removes configurations for PAM ...
    Rule Medium Severity
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  • SRG-OS-000363-GPOS-00150

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  • SLEM 5 must use a file integrity tool to verify correct operation of all security functions.

    Without verification of the security functions, security functions may not operate correctly, and the failure may go unnoticed. Security function is defined as the hardware, software, and/or firmwa...
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • SLEM 5 file integrity tool must be configured to verify Access Control Lists (ACLs).

    ACLs can provide permissions beyond those permitted through the file mode and must be verified by file integrity tools.
    Rule Medium Severity
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  • SRG-OS-000480-GPOS-00227

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  • SLEM 5 file integrity tool must be configured to verify extended attributes.

    Extended attributes in file systems are used to contain arbitrary data and file metadata with security implications.
    Rule Medium Severity
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  • SRG-OS-000278-GPOS-00108

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  • SLEM 5 file integrity tool must be configured to protect the integrity of the audit tools.

    Protecting the integrity of the tools used for auditing purposes is a critical step toward ensuring the integrity of audit information. Audit information includes all information (e.g., audit recor...
    Rule Medium Severity
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  • SRG-OS-000363-GPOS-00150

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  • Advanced Intrusion Detection Environment (AIDE) must verify the baseline SLEM 5 configuration at least weekly.

    Unauthorized changes to the baseline configuration could make the system vulnerable to various attacks or allow unauthorized access to SLEM 5. Changes to SLEM 5 configurations can have unintended s...
    Rule Medium Severity
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  • SRG-OS-000447-GPOS-00201

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  • SLEM 5 must notify the system administrator (SA) when Advanced Intrusion Detection Environment (AIDE) discovers anomalies in the operation of any security functions.

    If anomalies are not acted on, security functions may fail to secure the system. Security function is defined as the hardware, software, and/or firmware of the information system responsible for e...
    Rule Medium Severity
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  • SRG-OS-000479-GPOS-00224

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  • SLEM 5 must offload rsyslog messages for networked systems in real time and offload standalone systems at least weekly.

    Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity.
    Rule Medium Severity
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  • SRG-OS-000337-GPOS-00129

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  • SLEM 5 must have the auditing package installed.

    Without establishing what type of events occurred, the source of events, where events occurred, and the outcome of events, it would be difficult to establish, correlate, and investigate the events ...
    Rule Medium Severity
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  • SRG-OS-000037-GPOS-00015

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  • SLEM 5 audit records must contain information to establish what type of events occurred, the source of events, where events occurred, and the outcome of events.

    Without establishing what type of events occurred, the source of events, where events occurred, and the outcome of events, it would be difficult to establish, correlate, and investigate the events ...
    Rule Medium Severity
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  • SRG-OS-000342-GPOS-00133

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  • The audit-audispd-plugins package must be installed on SLEM 5.

    Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity. Th...
    Rule Medium Severity
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  • SRG-OS-000341-GPOS-00132

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  • SLEM 5 must allocate audit record storage capacity to store at least one week of audit records when audit records are not immediately sent to a central audit record storage facility.

    To ensure SLEM 5 has a sufficient storage capacity in which to write the audit logs, SLEM 5 must be able to allocate audit record storage capacity. The task of allocating audit record storage capa...
    Rule Medium Severity
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