Skip to content

Latest commit

 

History

History
81 lines (62 loc) · 7.36 KB

mitigations.md

File metadata and controls

81 lines (62 loc) · 7.36 KB

Mitigation Strategies Analysis for iced-rs/iced

Mitigation Strategy: Type-Safe Input Handling and Validation (Iced-Specific)

  • Description:

    1. Iced Widget Events: Utilize Iced's built-in widget events, such as TextInput::on_input, Slider::on_change, and similar events for other input widgets. These events are specific to Iced and are the primary mechanism for reacting to user input.
    2. Message Passing: Within the event handlers (e.g., the closure passed to on_input), construct Iced messages that encapsulate the input data. These messages are then passed to the update function. This is the core Iced architecture.
    3. update Function Validation: Perform all type conversion (e.g., string.parse::<u32>()) and validation (range checks, length limits, etc.) within the update function after receiving the message. This ensures that the application's state is only updated with valid data.
    4. Custom Widget update: If you create custom Iced widgets, implement the validation logic within the update method of your custom widget's Component implementation. This is crucial for maintaining consistency and security.
    5. Iced-Specific Error Display: Use Iced's Text widget or other Iced UI elements to display error messages to the user if validation fails. Do not update the application state if validation fails.

  • Threats Mitigated:

    • Logic Errors (Medium Severity): Prevents Iced-specific logic errors caused by invalid data being processed by Iced widgets or the Iced rendering pipeline.
    • Denial of Service (DoS) (Medium Severity): By validating input within the Iced event loop, you prevent excessively large or malformed input from consuming resources within Iced's rendering or layout processes.
    • Code Injection (Low Severity - in most Iced contexts): While Rust mitigates traditional code injection, Iced-specific validation prevents logic-level injection that could manipulate the Iced UI or application state.

  • Impact:

    • Logic Errors: Risk significantly reduced within the Iced UI.
    • DoS: Risk reduced for DoS attacks targeting the Iced event loop and rendering.
    • Code Injection: Risk significantly reduced in typical Iced scenarios.

  • Currently Implemented (Example):

    • Basic message passing from TextInput to update is likely implemented.

  • Missing Implementation (Example):

    • Consistent use of on_input for real-time validation might be missing.
    • Custom widgets might not have thorough validation within their update method.
    • Iced-specific error display using Text might be inconsistent.

Mitigation Strategy: Strict Message Type Checking (Iced-Specific)

  • Description:

    1. Central Message Enum: Define a Rust enum that represents all possible messages that can be handled by your Iced application's update function. This is a fundamental part of the Iced architecture.
    2. Specific Message Payloads: Use specific data types within the enum variants to represent the data associated with each message (e.g., Message::Increment(u32), Message::TextChanged(String)). Avoid generic types.
    3. Exhaustive match in update: In your Iced application's update function, use a match statement to handle all possible variants of the Message enum. This is enforced by the Rust compiler and is a core part of how Iced applications process events.
    4. Iced Command Handling: Use Command::none() or construct appropriate Command values within the match arms to handle side effects (e.g., fetching data, interacting with the system). This is the Iced-specific way to manage asynchronous operations.

  • Threats Mitigated:

    • Logic Errors (Medium Severity): Prevents Iced-specific logic errors caused by the update function receiving and processing unexpected or malformed messages.
    • Code Injection (Low Severity - in most Iced contexts): Reduces the risk (though already low due to Rust's safety) of an attacker somehow injecting malicious messages into the Iced event loop.

  • Impact:

    • Logic Errors: Risk significantly reduced within the Iced application logic.
    • Code Injection: Risk further reduced, though the primary defense is still Rust's memory safety.

  • Currently Implemented (Example):

    • A central Message enum is likely defined.
    • match statements are used in the update function.

  • Missing Implementation (Example):

    • Some message variants might use generic types.
    • Error handling for unexpected messages (a wildcard _ arm in the match) might be missing.

Mitigation Strategy: Secure Subscription Handling (Iced-Specific)

  • Description:

    1. iced::Subscription: This strategy focuses specifically on the use of iced::Subscription for handling external events.
    2. Resource Limits (within Subscription): When creating an iced::Subscription, implement limits within the subscription's logic on the resources it can consume. This is crucial for preventing DoS attacks that might try to flood the Iced application with events. For example, if the subscription reads from a network stream, limit the rate at which data is read and processed before it's turned into an Iced message.
    3. Error Handling (within Subscription): Implement robust error handling within the subscription's logic itself. Use Result types to handle potential errors and, if necessary, generate an Iced message to notify the update function of the error.
    4. Cancellation (Subscription::none()): Ensure that subscriptions can be cancelled properly using Subscription::none() when they are no longer needed. This is essential for preventing resource leaks and ensuring that the Iced application doesn't continue processing irrelevant events. This is a core part of managing Iced subscriptions.
    5. Timeout (within Subscription): If subscription is waiting for some external event, implement timeout within the subscription's logic, to avoid indefinite waiting.

  • Threats Mitigated:

    • Denial of Service (DoS) (Medium Severity): Prevents attackers from overwhelming the Iced application with events through iced::Subscription.
    • Resource Exhaustion (Medium Severity): Prevents Iced subscriptions from consuming excessive resources.
    • Logic Errors (Medium Severity): Proper error handling within the subscription prevents Iced-specific logic errors.

  • Impact:

    • DoS: Risk reduced for DoS attacks targeting Iced subscriptions.
    • Resource Exhaustion: Risk significantly reduced for Iced-related resource consumption.
    • Logic Errors: Risk reduced within the Iced event handling.

  • Currently Implemented (Example):

    • Some basic iced::Subscription usage might exist.

  • Missing Implementation (Example):

    • Resource limits within the subscription logic might be missing.
    • Error handling within the subscription might be incomplete.
    • Proper cancellation using Subscription::none() might be missing.
    • Timeouts might be missing.