// 脆弱性を示す簡略化された疑似コード
void process_system_packet(Packet *p) {
    if (p->type == MALICIOUS_TYPE) {
        // 境界チェックの欠如によりバッファオーバーフローが可能
        memcpy(kernel_buffer, p->payload, p->size);  // CVE-2025-48593
        execute_payload(); // リモートコード実行が達成
    }
}

# デバイスのセキュリティパッチレベルを確認
adb shell getprop ro.build.version.security_patch
# 期待される出力: 2025-11-01 または 2025-11-05

%%{init: {'theme': 'base', 'themeVariables': {'fontSize': '13px', 'fontFamily': 'Arial', 'primaryColor': '#d32f2f', 'primaryTextColor': '#fff', 'primaryBorderColor': '#b71c1c', 'lineColor': '#ef5350', 'secondaryColor': '#1976d2', 'secondaryTextColor': '#fff', 'tertiaryColor': '#388e3c', 'tertiaryTextColor': '#fff'}}}%%
sequenceDiagram
    participant A as 🎯 Attacker
    participant N as 🌐 Network
    participant D as 📱 Device
    participant S as ⚙️ System
    participant K as 🔒 Kernel

    A->>N: 1. Send malicious packet
    Note over N: Wi-Fi/Bluetooth/Cellular
    N->>D: 2. Packet delivered
    Note over D: ⚠️ Zero user interaction
    D->>S: 3. process_system_packet()
    Note over S: ❌ Missing validation
    S->>S: 4. memcpy() overflow
    S->>K: 5. Overwrite kernel memory
    K->>K: 6. Execute shellcode
    Note over K: 🚨 Full compromise
    K-->>A: 7. Establish reverse shell
    A->>K: 8. Execute commands

%%{init: {'theme': 'base', 'themeVariables': {'fontSize': '12px', 'primaryColor': '#c62828', 'primaryTextColor': '#fff'}}}%%
graph LR
    A["1️⃣ Packet<br/>Crafting"] --> B["2️⃣ Network<br/>Transmission"]
    B --> C["3️⃣ Device<br/>Reception"]
    C --> D["4️⃣ System<br/>Processing"]
    D --> E["5️⃣ Buffer<br/>Overflow"]
    E --> F["6️⃣ Kernel<br/>Execution"]
    F --> G["7️⃣ Full<br/>Compromise"]
    
    style A fill:#ff5252,stroke:#d32f2f,color:#fff
    style B fill:#ff6e40,stroke:#e64a19,color:#fff
    style C fill:#ffb74d,stroke:#f57c00,color:#fff
    style D fill:#ffa726,stroke:#f57f00,color:#fff
    style E fill:#ffca28,stroke:#fbc02d,color:#333
    style F fill:#ff7043,stroke:#e64a19,color:#fff
    style G fill:#c62828,stroke:#b71c1c,color:#fff

%%{init: {'theme': 'base', 'themeVariables': {'fontSize': '11px'}}}}%%
graph TD
    Start["🛡️ CVE-2025-48593<br/>Defense Strategy"] 
    
    subgraph Prevention["Prevention Layer"]
        P1["✅ Security Patch<br/>November 2025"]
        P2["🔌 Disable Unused<br/>Interfaces"]
        P3["🛡️ Enable Play<br/>Protect"]
    end
    
    subgraph Detection["Detection Layer"]
        D1["📊 Monitor<br/>Network Traffic"]
        D2["📝 Track System<br/>Logs"]
        D3["🔍 Deploy EDR/MDM"]
    end
    
    subgraph Response["Response Layer"]
        R1["🚨 Isolate<br/>Devices"]
        R2["⚡ Force Update"]
        R3["🔬 Analyze<br/>Forensics"]
    end
    
    Start --> Prevention
    Prevention --> Detection
    Detection --> Response
    
    P1 --> D1
    P2 --> D2
    P3 --> D3
    
    D1 --> R1
    D2 --> R2
    D3 --> R3
    
    style Start fill:#1565c0,stroke:#0d47a1,color:#fff
    style P1 fill:#00897b,stroke:#004d40,color:#fff
    style P2 fill:#00897b,stroke:#004d40,color:#fff
    style P3 fill:#00897b,stroke:#004d40,color:#fff
    style D1 fill:#f57f17,stroke:#e65100,color:#fff
    style D2 fill:#f57f17,stroke:#e65100,color:#fff
    style D3 fill:#f57f17,stroke:#e65100,color:#fff
    style R1 fill:#d32f2f,stroke:#b71c1c,color:#fff
    style R2 fill:#d32f2f,stroke:#b71c1c,color:#fff
    style R3 fill:#d32f2f,stroke:#b71c1c,color:#fff

%%{init: {'theme': 'base', 'themeVariables': {'fontSize': '11px'}}}}%%
graph TD
    Start["📋 Google Security<br/>Team"] --> A["🔧 Develop &<br/>Test Patch"]
    A --> B["📤 Release to AOSP<br/>Nov 1-5, 2025"]
    
    B --> C{"Distribution<br/>Channels"}
    
    C -->|Direct Push| D1["Pixel<br/>Devices"]
    C -->|OEM Update| D2["Samsung"]
    C -->|OEM Update| D3["OnePlus"]
    C -->|OEM Update| D4["Others"]
    
    D1 --> E1["⚡ Week 1<br/>OTA"]
    D2 --> E2["📅 Week 2-4<br/>Monthly"]
    D3 --> E3["📅 Week 2-4<br/>Monthly"]
    D4 --> E4["📅 Week 2-6<br/>Monthly"]
    
    E1 --> F["👤 End User<br/>Installation"]
    E2 --> F
    E3 --> F
    E4 --> F
    
    F --> G{"✔️ Success?"}
    
    G -->|Yes| H["✅ Patch Level<br/>2025-11-01+"]
    G -->|No| I["🔄 Retry/<br/>Manual Update"]
    
    H --> J["🔐 Device<br/>Protected"]
    I --> F
    
    J --> K["✨ Vulnerability<br/>Mitigated"]
    
    style Start fill:#1976d2,stroke:#0d47a1,color:#fff
    style A fill:#1976d2,stroke:#0d47a1,color:#fff
    style B fill:#0288d1,stroke:#01579b,color:#fff
    style C fill:#424242,stroke:#212121,color:#fff
    style D1 fill:#0097a7,stroke:#006064,color:#fff
    style D2 fill:#0097a7,stroke:#006064,color:#fff
    style D3 fill:#0097a7,stroke:#006064,color:#fff
    style D4 fill:#0097a7,stroke:#006064,color:#fff
    style E1 fill:#00acc1,stroke:#00838f,color:#fff
    style E2 fill:#00acc1,stroke:#00838f,color:#fff
    style E3 fill:#00acc1,stroke:#00838f,color:#fff
    style E4 fill:#00acc1,stroke:#00838f,color:#fff
    style F fill:#26c6da,stroke:#00acc1,color:#000
    style G fill:#616161,stroke:#424242,color:#fff
    style H fill:#00897b,stroke:#00695c,color:#fff
    style I fill:#d32f2f,stroke:#b71c1c,color:#fff
    style J fill:#388e3c,stroke:#1b5e20,color:#fff
    style K fill:#1b5e20,stroke:#0d3817,color:#fff