Admin SSH Key is compromised accepted Legacy (Tails/SVS)

THREAT3 · Accepted: The team has decided to live with this risk. · Defined in catalog.py:64

Risk: High impact × Very Low likelihood = 3 low
After mitigations: High impact × Very Low likelihood = 3 low (unchanged)

An adversary compromises the SSH key for mon and app servers

Threat actors: Nation State / Law Enforcement Large Corporation

Mitigations

Mitigation	Status
HidServAuth token on SSH MITIG4	optional

Possible further mitigations

HidServAuth token on SSH MITIG4 optional

Residual risk

Risk is accepted

Where it applies

Applies to 1 component in 1 scenario.

Admin Workstation (device) Legacy (Tails/SVS) Admin Workstation (Tails)

Workstation lifecycle and backups Legacy (Tails/SVS) · Admin Workstation (device)

digraph tm {
    graph [
        fontname = Arial;
        fontsize = 14;
    ]
    node [
        fontname = Arial;
        fontsize = 14;
    ]
    edge [
        fontname = Arial;
        fontsize = 12;
    ]
    nodesep = 1;

    subgraph cluster_boundary_Admin_Workstation__Tails_ {
        graph [
            fontsize = 10;
            fontcolor = black;
            style = dashed;
            color = firebrick2;
            label = <<i>Admin Workstation (Tails)</i>>;
        ]

        component_Admin_Workstation__device__Admin_Workstation__Tails_ [
            shape = circle;
            color = black;
            fontcolor = black;
            label = "Admin\nWorkstation\n(device)";
            URL = "component_Admin_Workstation__device_.html";
            tooltip = "Admin Workstation (device) (Legacy (Tails/SVS))";
            margin = 0.02;

            style = "filled,dashed";

            fillcolor = "#c0392b";

            fontcolor = "white";

            class = "tagged highlighted";
        ]

    }

    subgraph cluster_boundary_Journalist_Workstation__Tails_ {
        graph [
            fontsize = 10;
            fontcolor = black;
            style = dashed;
            color = firebrick2;
            label = <<i>Journalist Workstation (Tails)</i>>;
        ]

        component_Journalist_Workstation__device__Journalist_Workstation__Tails_ [
            shape = circle;
            color = black;
            fontcolor = black;
            label = "Journalist\nWorkstation\n(device)";
            URL = "component_Journalist_Workstation__device_.html";
            tooltip = "Journalist Workstation (device) (Legacy (Tails/SVS))";
            margin = 0.02;
            style = "dashed";
            class = "tagged";
        ]

    }

    actor_Administrator_ [
        shape = square;
        color = black;
        fontcolor = black;
        label = "Administrator";
        URL = "component_Administrator.html";
        tooltip = "Administrator";
        margin = 0.02;
    ]

    component_Backup___recovery_media_ [
        shape = circle;
        color = black;
        fontcolor = black;
        label = "Backup /\nrecovery media";
        URL = "component_Backup___recovery_media.html";
        tooltip = "Backup / recovery media";
        margin = 0.02;
    ]

    actor_Journalist_ [
        shape = square;
        color = black;
        fontcolor = black;
        label = "Journalist";
        URL = "component_Journalist.html";
        tooltip = "Journalist";
        margin = 0.02;
    ]

    actor_Administrator_ -> component_Admin_Workstation__device__Admin_Workstation__Tails_ [        color = black;        fontcolor = black;        dir = forward;        label = "1. Admin operates\nworkstation";    ]
    actor_Journalist_ -> component_Journalist_Workstation__device__Journalist_Workstation__Tails_ [        color = black;        fontcolor = black;        dir = forward;        label = "2. Journalist\noperates workstation";    ]
    component_Admin_Workstation__device__Admin_Workstation__Tails_ -> component_Backup___recovery_media_ [        color = black;        fontcolor = black;        dir = forward;        label = "3. Back up secrets";    ]
}

Notes

Existing mitigations: Tor Hidden Service authentication is used to access SSH over the Tor Hidden Service (MITIG4). Further mitigations: Force MITIG4 (currently just suggested). Automated test for mitigation: No.

How this threat is matched

Listed for these components. A boundary covers every component inside it.