The following code is for security research and authorized testing only.
python
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
// Simulated vulnerable structure in the communication module
typedef struct {
int session_id;
char *data_buffer;
} CommSession;
void trigger_vulnerability() {
// Step 1: Allocate memory for the session
CommSession *session = (CommSession *)malloc(sizeof(CommSession));
session->data_buffer = (char *)malloc(1024);
session->session_id = 0xDEADBEEF;
printf("[+] Session allocated. ID: 0x%x\n", session->session_id);
// Step 2: Simulate module logic that frees the session
// Vulnerability: The code frees the object but keeps a reference in a global list
free(session->data_buffer);
free(session);
printf("[+] Session freed.\n");
// Step 3: Use-After-Free trigger
// The module later attempts to use the freed session pointer
if (session != NULL) {
printf("[*] Attempting to write to freed memory...\n");
// This write corrupts memory, leading to a crash or potential execution flow control
strcpy(session->data_buffer, "MALICIOUS_PAYLOAD");
}
}
int main() {
trigger_vulnerability();
return 0;
}