| """Reference checker: does a piece of text cite CWE / ATT&CK ids whose names match the official MITRE data? |
| Used to FILTER third-party AI-written Q&A (Trendyol, Fenrir, Heimdall, ...): a row is dropped if it cites a CWE id that does not exist, or names an |
| enterprise ATT&CK technique / CWE with a name that does not match. (We cannot check every fact, but we can remove rows that are provably wrong.)""" |
| import difflib, json, os, re, zipfile |
| import xml.etree.ElementTree as ET |
|
|
| HERE = os.path.dirname(os.path.abspath(__file__)) |
| _z = zipfile.ZipFile(os.path.join(HERE, "raw", "cwec.xml.zip")); _root = ET.fromstring(_z.read(_z.namelist()[0])); _ns = {"c": _root.tag.split("}")[0][1:]} |
| CWE = {"CWE-" + w.get("ID"): w.get("Name") for w in _root.findall(".//c:Weakness", _ns)} |
| CWE.update({"CWE-" + w.get("ID"): w.get("Name") for w in _root.findall(".//c:Category", _ns)}) |
| ATT = {} |
| for _o in json.load(open(os.path.join(HERE, "raw", "enterprise-attack.json")))["objects"]: |
| if _o["type"] == "attack-pattern": |
| for _r in _o.get("external_references", []): |
| if _r.get("source_name") == "mitre-attack": ATT[_r["external_id"]] = _o["name"] |
| P_CWE = re.compile(r"\b(CWE-\d+)\b\s*[\(:–—-]\s*([A-Z][A-Za-z0-9 ,'/\-]{4,70})") |
| P_CWE_ID = re.compile(r"\bCWE-(\d+)\b") |
| P_ATT = re.compile(r"\b(T\d{4}(?:\.\d{3})?)\b\s*[\(:–—-]\s*([A-Z][A-Za-z0-9 ,'/\-&:]{3,70})") |
| NONENT = re.compile(r"T0\d{3}|T14\d{2}|T15\d{2}") |
|
|
|
|
| def _sim(a, b): return difflib.SequenceMatcher(None, a.lower(), b.lower()).ratio() |
|
|
|
|
| def ref_ok(text): |
| """True if no citation in `text` is provably wrong.""" |
| text = text or "" |
| for m in P_CWE_ID.finditer(text): |
| if "CWE-" + m.group(1) not in CWE: return False |
| for m in P_CWE.finditer(text): |
| i, name = m.group(1), m.group(2).strip() |
| off = CWE[i] |
| if _sim(name[: len(off) + 6], off) < 0.55 and off.lower() not in name.lower() and name.lower().split(" (")[0] not in off.lower(): return False |
| for m in P_ATT.finditer(text): |
| i, name = m.group(1), m.group(2).strip() |
| if i not in ATT: |
| if NONENT.match(i) or i.split(".")[0] in ATT: continue |
| return False |
| off = ATT[i] |
| if _sim(name[: len(off) + 6], off) < 0.55 and off.lower() not in name.lower() and name.lower() not in off.lower(): return False |
| return True |
|
|
