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I - Mission Critical Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-VOIP-000500

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  • The Session Border Controller (SBC) must be configured to only process signaling packets whose integrity is validated.

    The validation of signaling packet integrity is required to ensure the packet has not been altered in transit. Packets can be altered during uncontrollable network events, such as bit errors and pa...
    Rule Medium Severity
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  • SRG-VOIP-000510

    Group
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  • The Session Border Controller (SBC) must be configured to validate the structure and validity of SIP and AS-SIP messages so that malformed messages or messages containing errors are dropped before action is taken on the contents.

    Malformed SIP and AS_SIP messages, as well as messages containing errors, could be an indication that an adversary is attempting some form of attack or denial of service. Such an attack is called f...
    Rule Low Severity
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  • SRG-VOIP-000520

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  • The Session Border Controller (SBC) must drop all SIP and AS-SIP packets except those secured with TLS.

    DISN NIPRNet IPVS PMO and the Unified Capabilities Requirements (UCR) require all session signaling across the DISN WAN and between the Local Session Controller (LSC) and EBC to be secured with TLS...
    Rule Medium Severity
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  • SRG-VOIP-000530

    Group
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  • The Session Border Controller (SBC) must be configured to manage IP port pinholes for the SRTP/SRTCP bearer streams based on the information in the SIP and AS-SIP messages.

    The function of the SBC is to manage SIP and AS-SIP signaling messages. The SBC also manages the SRTP/SRTCP bearer streams. The DISN IPVS PMO has determined that the SBC will pass the negotiated an...
    Rule Medium Severity
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  • SRG-VOIP-000540

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  • The Session Border Controller (SBC) (or similar firewall type device) must perform stateful inspection and packet authentication for all VVoIP traffic (inbound and outbound) and deny all other packets.

    Once a pinhole is opened in the enclave boundary for a known session, the packets that are permitted to pass must be managed. If they are not properly managed, packets that are not part of a known ...
    Rule High Severity
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