Landing page source control is compromised inform

THREAT57 · Inform: Handled by telling users how to protect themselves. · Defined in catalog.py:1007

Risk: High impact × High likelihood = 12 high
After mitigations: High impact × Low likelihood = 6 medium

Organisation's SD landing page source repository is compromised, resulting in an attacker altering contents of the page, such as the link to their own malicious SecureDrop Instance, or injecting resources in an attempt to deanonymise a user

Threat actors: Nation State / Law Enforcement Large Corporation

Mitigations

Mitigation	Status
Landing page deployment guide explains some security best practices for the webserver hosting the onion URL MITIG103	implemented

Possible further mitigations

Alerts sent to admins and FPF when onion URLs change on landing pages (from monitoring via multiple Tor circuits and physical locations) MITIG104 proposed

Residual risk

Administrator error or omission

Where it applies

Applies to 1 component in 1 scenario.

Landing page External Services

Source discovery and OPSEC · Landing page

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

    subgraph cluster_boundary_External_Services {
        graph [
            fontsize = 10;
            fontcolor = black;
            style = dashed;
            color = firebrick2;
            label = <<i>External Services</i>>;
        ]

        component_Landing_page_External_Services [
            shape = circle;
            color = black;
            fontcolor = black;
            label = "Landing page";
            URL = "component_Landing_page.html";
            tooltip = "Landing page";
            margin = 0.02;

            style = "filled";

            fillcolor = "#c0392b";

            fontcolor = "white";

            class = "highlighted";
        ]

        component_SecureDrop_org_directory_External_Services [
            shape = circle;
            color = black;
            fontcolor = black;
            label = "SecureDrop.org\ndirectory";
            URL = "component_SecureDrop_org_directory.html";
            tooltip = "SecureDrop.org directory";
            margin = 0.02;
        ]

    }

    subgraph cluster_boundary_SecureDrop_Area {
        graph [
            fontsize = 10;
            fontcolor = black;
            style = dashed;
            color = firebrick2;
            label = <<i>SecureDrop Area</i>>;
        ]

        component_Dedicated_Hardware_Firewall_SecureDrop_Area [
            shape = circle;
            color = black;
            fontcolor = black;
            label = "Dedicated\nHardware\nFirewall";
            URL = "component_Dedicated_Hardware_Firewall.html";
            tooltip = "Dedicated Hardware Firewall";
            margin = 0.02;
        ]

    }

    subgraph cluster_boundary_Source_Area {
        graph [
            fontsize = 10;
            fontcolor = black;
            style = dashed;
            color = firebrick2;
            label = <<i>Source Area</i>>;
        ]

        actor_Source_Source_Area [
            shape = square;
            color = black;
            fontcolor = black;
            label = "Source";
            URL = "component_Source.html";
            tooltip = "Source";
            margin = 0.02;
        ]

        component_Source_Tor_Browser_Source_Area [
            shape = circle;
            color = black;
            fontcolor = black;
            label = "Source Tor\nBrowser";
            URL = "component_Source_Tor_Browser.html";
            tooltip = "Source Tor Browser";
            margin = 0.02;
        ]

        component_Source_environment_Source_Area [
            shape = circle;
            color = black;
            fontcolor = black;
            label = "Source\nenvironment";
            URL = "component_Source_environment.html";
            tooltip = "Source environment";
            margin = 0.02;
        ]

    }

    actor_Source_Source_Area -> component_Source_environment_Source_Area [        color = black;        fontcolor = black;        dir = forward;        label = "1. Research / browse";    ]
    component_Source_environment_Source_Area -> component_SecureDrop_org_directory_External_Services [        color = black;        fontcolor = black;        dir = forward;        label = "2. Check directory";    ]
    component_Source_environment_Source_Area -> component_Landing_page_External_Services [        color = black;        fontcolor = black;        dir = forward;        label = "3. Visit landing\npage";    ]
    actor_Source_Source_Area -> component_Source_Tor_Browser_Source_Area [        color = black;        fontcolor = black;        dir = forward;        label = "4. Open Tor Browser";    ]
    component_Source_Tor_Browser_Source_Area -> component_Dedicated_Hardware_Firewall_SecureDrop_Area [        color = black;        fontcolor = black;        dir = forward;        label = "5. Connect to onion";    ]
}

Notes

Existing mitigations: Securedrop deployment guide: https://docs.securedrop.org/en/stable/deployment_practices.html?page#landing-page (MITIG103). Further mitigations: FPF Landing page scanner could be used to verify the integrity of the page and alert on changes (MITIG104). Automated test for mitigation: No.

How this threat is matched

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