| """ |
| Parse data/CTI/raw/cwe_latest.xml into per-CWE Python dicts ready for chunking. |
| """ |
|
|
| import xml.etree.ElementTree as ET |
| from pathlib import Path |
| from typing import List, Dict, Any |
| import sys |
|
|
| project_root = Path(__file__).parent.parent.parent |
| sys.path.insert(0, str(project_root)) |
| from config import Config |
|
|
| _NS = "{http://cwe.mitre.org/cwe-7}" |
|
|
|
|
| def _text(el, tag: str) -> str: |
| child = el.find(_NS + tag) |
| if child is None: |
| return "" |
| parts = [] |
| if child.text: |
| parts.append(child.text.strip()) |
| |
| for sub in child: |
| t = (sub.text or "").strip() + (sub.tail or "").strip() |
| if t: |
| parts.append(t) |
| return " ".join(parts).strip() |
|
|
|
|
| def _list_text(el, container_tag: str, item_tag: str, attrib: str = "Nature") -> List[str]: |
| container = el.find(_NS + container_tag) |
| if container is None: |
| return [] |
| return [ |
| item.get(attrib, "") |
| for item in container.findall(_NS + item_tag) |
| if item.get(attrib) |
| ] |
|
|
|
|
| def parse_cwe_xml(xml_path: Path | None = None) -> List[Dict[str, Any]]: |
| """Return a list of CWE dicts from the MITRE CWE XML catalogue.""" |
| if xml_path is None: |
| config = Config() |
| xml_path = config.cti_data_dir / "cwe_latest.xml" |
|
|
| tree = ET.parse(xml_path) |
| root = tree.getroot() |
|
|
| entries: List[Dict[str, Any]] = [] |
| for weakness in root.findall(".//" + _NS + "Weakness"): |
| cwe_id = "CWE-" + weakness.get("ID", "") |
| name = weakness.get("Name", "") |
| abstract = weakness.get("Abstraction", "") |
| status = weakness.get("Status", "") |
|
|
| description = _text(weakness, "Description") |
| extended = _text(weakness, "Extended_Description") |
|
|
| |
| consequences: List[str] = [] |
| cc = weakness.find(_NS + "Common_Consequences") |
| if cc is not None: |
| for cons in cc.findall(_NS + "Consequence"): |
| for imp in cons.findall(_NS + "Impact"): |
| if imp.text: |
| consequences.append(imp.text.strip()) |
|
|
| |
| capec_refs: List[str] = [] |
| rap = weakness.find(_NS + "Related_Attack_Patterns") |
| if rap is not None: |
| for ref in rap.findall(_NS + "Related_Attack_Pattern"): |
| cid = ref.get("CAPEC_ID") |
| if cid: |
| capec_refs.append(f"CAPEC-{cid}") |
|
|
| entries.append({ |
| "id": cwe_id, |
| "name": name, |
| "abstraction": abstract, |
| "status": status, |
| "description": description, |
| "extended_description": extended, |
| "consequences": consequences, |
| "capec_refs": capec_refs, |
| }) |
|
|
| return entries |
|
|
|
|
| if __name__ == "__main__": |
| entries = parse_cwe_xml() |
| print(f"Parsed {len(entries)} CWE entries") |
| print("Sample:", entries[0]) |
|
|
