From 0eb7318fd0adf270a1e80bdfa30a1146a117c602 Mon Sep 17 00:00:00 2001
From: joyfaker <joyfakerauth@gmail.com>
Date: Mon, 29 Dec 2025 13:52:16 +0800
Subject: [PATCH] test cpp

---
 vulnerable.cpp | 101 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 vulnerable.cpp

diff --git a/vulnerable.cpp b/vulnerable.cpp
new file mode 100644
index 0000000..685e986
--- /dev/null
+++ b/vulnerable.cpp
@@ -0,0 +1,101 @@
+#include <iostream>
+#include <cstring>
+#include <vector>
+#include <string>
+#include <cstdlib>
+#include <ctime>
+
+using namespace std;
+
+// 1. 硬编码敏感信息 (CWE-798)
+// SAST 会扫描变量名（如 api_key, secret）和高熵字符串
+const string AWS_SECRET_KEY = "AKIAIOSFODNN7EXAMPLE"; 
+
+class UserManager {
+public:
+    // 2. 也是硬编码，且作为类成员
+    string db_password = "root";
+
+    // 3. SQL 注入 (CWE-89)
+    // 直接拼接字符串构建 SQL 查询是 C++ Web 后端常见的严重漏洞
+    void queryUser(string userId) {
+        string query = "SELECT * FROM users WHERE id = '" + userId + "'";
+        cout << "Executing query: " << query << endl;
+    }
+
+    // 4. 命令注入 (CWE-78)
+    // 允许外部输入直接进入 system() 函数
+    void pingHost(string ipAddress) {
+        string cmd = "ping -c 4 " + ipAddress;
+        system(cmd.c_str());
+    }
+};
+
+void legacyBufferOverflow(char* input) {
+    char buffer[10];
+    
+    // 5. 经典的栈缓冲区溢出 (CWE-121)
+    // 虽然是 C++，但混用 C 风格字符串处理函数非常常见且危险
+    strcpy(buffer, input); 
+}
+
+void memoryLeakAndRawPointers() {
+    // 6. 内存泄漏 (CWE-401)
+    // 使用了 new 但没有 delete
+    int* data = new int[100];
+    data[0] = 10;
+    
+    // 抛出异常可能导致 delete 永远不执行 (异常安全问题)
+    if (data[0] == 10) {
+        // throw runtime_error("Error occurred!"); 
+        return; 
+    }
+    
+    delete[] data;
+}
+
+void iteratorInvalidation() {
+    vector<int> numbers = {1, 2, 3, 4, 5};
+
+    // 7. 迭代器失效 (CWE-835/Logic Error)
+    // 在遍历 vector 时进行 push_back 会导致底层数组重新分配，
+    // 从而使迭代器失效，导致未定义行为或崩溃。
+    for (auto it = numbers.begin(); it != numbers.end(); ++it) {
+        if (*it == 3) {
+            numbers.push_back(6); 
+        }
+    }
+}
+
+void weakRandomness() {
+    // 8. 弱伪随机数生成器 (CWE-338)
+    // srand/rand 不适合用于安全相关的随机数生成
+    srand(time(NULL));
+    int token = rand(); 
+    cout << "Security Token: " << token << endl;
+}
+
+int main(int argc, char* argv[]) {
+    UserManager um;
+
+    if (argc < 2) {
+        return 1;
+    }
+
+    // 模拟攻击路径
+    um.queryUser(argv[1]); // 传入 "' OR '1'='1" 即可注入
+    
+    legacyBufferOverflow(argv[1]);
+    
+    memoryLeakAndRawPointers();
+    
+    iteratorInvalidation();
+    
+    weakRandomness();
+
+    // 9. 被除数为零 (CWE-369)
+    int x = 0;
+    int y = 100 / x; 
+
+    return 0;
+}
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