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0xMarcio
08d697bd12
A CVE List V5 record names what it is about: a title such as "PAN-OS: Arbitrary File Creation Leads to OS Command Injection Vulnerability in GlobalProtect", a vendor and its products. None of it was kept, so a query for pan-os or prisma access only found records whose prose happened to say so. Every record now opens with the title in bold and a Vendor badge per affected vendor, refreshed from a local CVE List checkout in one pass and kept current by the daily sync for the records it fetches. Only the lines above the description move; descriptions and PoC sections are untouched. The pass also settled the heading link on cve.org and trimmed the stray space some version badges carried. The site index carries title, vendor and product for the 40 percent of indexed CVEs whose records have them. Search scores a hit in those above any position in the description, results show the title as a headline, and each page puts it under the CVE id, in the browser title, the meta description and an Affected row, with the block hubs listing it in place of the description's opening. The 35 MB metadata file the homepage needed before anything could be filtered is split in two for the page: the CVSS rows load with the rest, the advisories follow the index instead of competing with it for the connection. cve_metadata.json stays whole for anyone reading the API.
579 lines
21 KiB
Python
579 lines
21 KiB
Python
from __future__ import annotations
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import argparse
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import csv
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import gzip
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import io
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import json
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import re
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import urllib.request
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from datetime import datetime, timezone
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from functools import lru_cache
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from pathlib import Path
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from typing import Collection, Dict, Iterable, List, Optional
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from urllib.parse import unquote, urlparse
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ROOT = Path(__file__).resolve().parents[1]
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CVES = ROOT / "cves"
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INDEX = ROOT / "index"
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DOCS_DIR = ROOT / "docs"
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BLACKLIST = INDEX / "blacklist.txt"
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TRENDING_INPUT = INDEX / "trending.json"
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CVE_OUTPUT = DOCS_DIR / "CVE_list.json"
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TRENDING_OUTPUT = DOCS_DIR / "trending_poc.json"
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REPO_META = INDEX / "repo_meta.json"
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REPO_META_OUTPUT = DOCS_DIR / "repo_meta.json"
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KEV_INPUT = INDEX / "kev.json"
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DATES_INPUT = INDEX / "cve_dates.json"
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KEV_OUTPUT = DOCS_DIR / "kev.json"
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NUCLEI_INPUT = INDEX / "nuclei.json"
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NUCLEI_OUTPUT = DOCS_DIR / "nuclei.json"
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METADATA_INPUT = INDEX / "metadata"
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METADATA_OUTPUT = DOCS_DIR / "cve_metadata.json"
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# The same metadata in the two halves the page loads apart: the CVSS rows the
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# severity filter needs before anything can be searched, and the advisories
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# only a rendered row shows. cve_metadata.json stays whole for API readers.
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CVSS_OUTPUT = DOCS_DIR / "cvss.json"
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ADVISORIES_OUTPUT = DOCS_DIR / "advisories.json"
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VERIFIED_REFERENCES = INDEX / "reference_pocs.txt"
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EPSS_OUTPUT = DOCS_DIR / "epss.json"
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EPSS_FEED = "https://epss.empiricalsecurity.com/epss_scores-current.csv.gz"
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GITHUB_NON_REPOS = {
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"advisories", "apps", "collections", "marketplace", "notifications",
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"orgs", "security", "settings", "sponsors", "topics", "user-attachments",
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}
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CODE_SUFFIXES = {
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".c", ".cc", ".cpp", ".cs", ".go", ".java", ".js", ".md", ".nse",
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".php", ".pl", ".ps1", ".py", ".rb", ".rs", ".sh", ".ts", ".txt",
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".yaml", ".yml", ".zip",
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}
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MEDIA_SUFFIXES = {
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".bmp", ".gif", ".jpeg", ".jpg", ".mov", ".mp4", ".pdf", ".png",
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".svg", ".webm", ".webp",
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}
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def load_blacklist() -> set[str]:
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if not BLACKLIST.exists():
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return set()
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return {
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line.strip().lower()
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for line in BLACKLIST.read_text(encoding="utf-8").splitlines()
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if line.strip() and not line.lstrip().startswith("#")
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}
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def normalise_block(text: str) -> str:
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text = text.replace("\r\n", "\n")
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text = re.sub(r"\n{2,}", "\n", text.strip())
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lines = [
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re.sub(r"^#{1,6}\s+", "", line.lstrip("- ")).rstrip()
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for line in text.split("\n")
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]
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return "\n".join(line for line in lines if line)
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SECTION_HEADERS = ("### Description", "### POC", "#### Reference", "#### Github",
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"#### Nuclei", "#### ExploitDB", "#### Metasploit", "#### Vulhub",
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"#### Collections")
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# Sections whose links are kept apart from the repository list, with the
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# field each becomes in the published index.
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CURATED = (
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("#### Nuclei", "nuclei"),
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("#### ExploitDB", "edb"),
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("#### Metasploit", "msf"),
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("#### Vulhub", "vulhub"),
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("#### Collections", "collections"),
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)
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@lru_cache(maxsize=1)
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def load_metadata() -> Dict[str, object]:
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"""Canonical NVD metadata assembled from the tracked year shards."""
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entries: Dict[str, object] = {}
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if not METADATA_INPUT.exists():
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return entries
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for path in sorted(METADATA_INPUT.glob("[12][0-9][0-9][0-9].json")):
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payload = json.loads(path.read_text(encoding="utf-8"))
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if not isinstance(payload, dict):
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raise ValueError(f"{path} is not a CVE metadata object")
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entries.update(payload)
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return entries
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@lru_cache(maxsize=1)
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def load_verified_references() -> set[tuple[str, str]]:
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"""CVE Program references with direct exploit evidence."""
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try:
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lines = VERIFIED_REFERENCES.read_text(encoding="utf-8").splitlines()
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except OSError:
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return set()
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verified: set[tuple[str, str]] = set()
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for line in lines:
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if " - " not in line:
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continue
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cve_id, url = line.split(" - ", 1)
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if cve_id and url:
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verified.add((cve_id, link_key(url)))
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return verified
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BADGE = re.compile(r"!\[\]\(https://img\.shields\.io/static/v1\?label=(Vendor|Product)&message=([^&)]*)&")
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def parse_preamble(content: str) -> tuple[str, List[str], List[str]]:
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"""The record's title and its vendor and product badges, from above the description."""
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title = ""
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vendors: List[str] = []
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products: List[str] = []
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for line in content.splitlines():
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stripped = line.strip()
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if stripped == "### Description":
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break
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if not title and len(stripped) > 4 and stripped.startswith("**") and stripped.endswith("**"):
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title = " ".join(stripped[2:-2].split())
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continue
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match = BADGE.match(stripped)
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if not match:
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continue
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value = " ".join(unquote(match.group(2)).split())
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if value and value.lower() != "n/a":
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(vendors if match.group(1) == "Vendor" else products).append(value)
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return title, vendors, products
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def parse_sections(content: str) -> Dict[str, str]:
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"""Split an entry on its own headings only.
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CVE text lifted from a GitHub advisory often opens with "### Impact" or
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"### Summary"; treating any heading as a boundary let a description end
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itself and vanish from the index.
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"""
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sections: Dict[str, str] = {}
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current_header: Optional[str] = None
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buffer: List[str] = []
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for line in content.splitlines():
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header = line.strip()
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if header in SECTION_HEADERS:
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if current_header is not None:
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sections[current_header] = "\n".join(buffer).strip()
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current_header = header
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buffer = []
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else:
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buffer.append(line)
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if current_header is not None:
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sections[current_header] = "\n".join(buffer).strip()
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return sections
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GITHUB_HOSTS = {"github.com", "www.github.com"}
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def repo_from_url(url: str) -> str:
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"""owner/repo for a GitHub URL, matching repoFromUrl in logic.js exactly.
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Two disagreements with the browser lived here. "github" as a substring of
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the host accepted notgithub.example.com as a repository, and a clone URL
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kept its .git suffix, so poc-rebar3.git and poc-rebar3 counted as two
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sources on the page and one in search. 273 CVEs disagreed across the two.
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"""
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try:
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parsed = urlparse(url)
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host = (parsed.hostname or "").lower()
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if host and host not in GITHUB_HOSTS:
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return ""
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path = parsed.path or url
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except Exception:
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path = url
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parts = path.strip("/").split("/")
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if len(parts) < 2 or parts[0].lower() in GITHUB_NON_REPOS:
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return ""
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owner, repo = parts[0].lower(), re.sub(r"\.git$", "", parts[1], flags=re.I).lower()
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return f"{owner}/{repo}" if repo else ""
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def is_blacklisted(url: str, blacklist: Collection[str]) -> bool:
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full_name = repo_from_url(url)
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if not full_name:
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return False
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return full_name in blacklist
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def link_key(url: str) -> str:
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parsed = urlparse(url)
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if (parsed.hostname or "").lower() not in {"github.com", "www.github.com"}:
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return url.rstrip("/")
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parts = [part for part in parsed.path.split("/") if part]
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if len(parts) < 2:
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return url
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repo = f"{parts[0]}/{parts[1]}".lower()
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suffix = "/" + "/".join(parts[2:]) if len(parts) > 2 else ""
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return f"github:{repo}{suffix}?{parsed.query}#{parsed.fragment}"
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def source_key(url: str) -> str:
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"""Identity of one source, independent of a path inside its repository."""
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repo = repo_from_url(url)
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if repo and "/" in repo:
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return f"github:{repo}"
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return url.rstrip("/")
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def poc_link_rank(url: str, cve_id: str) -> tuple[int, int]:
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"""Choose the most useful path when one repository supplied several."""
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if not repo_from_url(url):
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return 0, len(url)
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parsed = urlparse(url)
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parts = [part for part in parsed.path.split("/") if part]
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suffix = "/".join(parts[2:]).lower()
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if not suffix:
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return 0, len(url)
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compact_cve = re.sub(r"[^a-z0-9]", "", cve_id.lower())
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compact_path = re.sub(r"[^a-z0-9]", "", suffix)
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if compact_cve and compact_cve in compact_path:
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return 1, len(url)
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extension = Path(parts[-1]).suffix.lower()
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if extension in CODE_SUFFIXES or "/security/advisories/" in parsed.path.lower():
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return 2, len(url)
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if re.search(r"(?:^|/)(?:poc|exploit|reproducer)(?:/|$)", suffix):
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return 3, len(url)
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if extension in MEDIA_SUFFIXES:
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return 6, len(url)
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return 4, len(url)
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def dedupe_source_links(urls: Iterable[str], cve_id: str) -> List[str]:
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selected: Dict[str, tuple[int, str]] = {}
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order: Dict[str, int] = {}
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for index, url in enumerate(urls):
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key = source_key(url)
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order.setdefault(key, index)
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current = selected.get(key)
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if current is None or poc_link_rank(url, cve_id) < poc_link_rank(current[1], cve_id):
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selected[key] = (index, url)
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return [selected[key][1] for key in sorted(selected, key=order.get)]
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def advisory_rank(row: list, cve_id: str) -> tuple[int, int, int]:
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url = str(row[0])
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tags = set(row[1] if len(row) > 1 and isinstance(row[1], list) else [])
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if "GitHub Advisory" in tags or "/security/advisories/" in url.lower():
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tag_rank = 0
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elif "Exploit" in tags:
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tag_rank = 1
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elif "Vendor Advisory" in tags:
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tag_rank = 2
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elif "Third Party Advisory" in tags or "Advisory" in tags:
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tag_rank = 3
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elif "Issue Tracking" in tags:
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tag_rank = 4
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elif "Patch" in tags:
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tag_rank = 5
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else:
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tag_rank = 6
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path_rank, length = poc_link_rank(url, cve_id)
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return tag_rank, path_rank, length
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def dedupe_advisories(rows: Iterable[list], cve_id: str) -> List[list]:
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selected: Dict[str, list] = {}
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order: Dict[str, int] = {}
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for index, row in enumerate(rows):
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if not isinstance(row, list) or not row:
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continue
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key = source_key(str(row[0]))
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order.setdefault(key, index)
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current = selected.get(key)
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if current is None or advisory_rank(row, cve_id) < advisory_rank(current, cve_id):
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selected[key] = row
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return [selected[key] for key in sorted(selected, key=order.get)]
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def reference_is_verified_poc(
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cve_id: str,
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url: str,
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metadata: Dict[str, object],
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verified: Collection[tuple[str, str]],
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) -> bool:
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key = link_key(url)
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if (cve_id, key) in verified:
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return True
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for row in (metadata.get(cve_id) or {}).get("advisories", []):
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if not isinstance(row, list) or not row:
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continue
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tags = row[1] if len(row) > 1 and isinstance(row[1], list) else []
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if "Exploit" in tags and link_key(str(row[0])) == key:
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return True
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return False
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def collect_links(block: str, *, blacklist: Optional[Collection[str]] = None) -> List[str]:
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links: List[str] = []
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blacklist = blacklist or set()
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for raw in block.splitlines():
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entry = raw.strip()
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if not entry or "No PoCs" in entry:
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continue
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if entry.startswith("- "):
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entry = entry[2:].strip()
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if not entry:
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continue
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if is_blacklisted(entry, blacklist):
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continue
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if entry not in links:
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links.append(entry)
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return links
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def build_cve_list(blacklist: Collection[str]) -> tuple[List[Dict[str, object]], int]:
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cve_entries = []
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dates = load_dates()
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metadata = load_metadata()
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verified_references = load_verified_references()
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total = 0
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for md_path in sorted(CVES.glob("[12][0-9][0-9][0-9]/CVE-*.md")):
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cve_id = md_path.stem
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if (metadata.get(cve_id) or {}).get("rejected"):
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continue
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total += 1
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content = md_path.read_text(encoding="utf-8")
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sections = parse_sections(content)
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description = normalise_block(sections.get("### Description", ""))
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references = collect_links(sections.get("#### Reference", ""), blacklist=blacklist)
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github_links = collect_links(sections.get("#### Github", ""), blacklist=blacklist)
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# These stay in their own lists: a template, an ExploitDB entry and a
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# Metasploit module are none of them somebody's repository, and should
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# not be ranked, starred or credited as one.
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curated = {
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field: dedupe_source_links(
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collect_links(sections.get(header, ""), blacklist=blacklist),
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cve_id,
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)
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for header, field in CURATED
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}
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curated_keys = {
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source_key(url)
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for links in curated.values()
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for url in links
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}
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poc_candidates: List[str] = []
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for link in references:
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key = source_key(link)
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if (
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key not in curated_keys
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and reference_is_verified_poc(cve_id, link, metadata, verified_references)
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):
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poc_candidates.append(link)
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for link in github_links:
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if source_key(link) not in curated_keys:
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poc_candidates.append(link)
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poc_entries = dedupe_source_links(poc_candidates, cve_id)
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if not poc_entries and not any(curated.values()):
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continue
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entry = {
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"cve": cve_id,
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"desc": description,
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"poc": poc_entries,
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}
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title, vendors, products = parse_preamble(content)
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if title:
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entry["title"] = title
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if vendors:
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entry["vendor"] = vendors
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if products:
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entry["product"] = products
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published, modified = (dates.get(cve_id) or ["", ""])[:2]
|
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if published:
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entry["published"] = published
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if modified and modified != published:
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entry["modified"] = modified
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entry.update({field: links for field, links in curated.items() if links})
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cve_entries.append(entry)
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return cve_entries, total
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|
|
|
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def build_repo_meta(cve_entries: List[Dict[str, object]]) -> Dict[str, object]:
|
|
"""Star count and last-push date for the repositories the index actually links."""
|
|
try:
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stored = json.loads(REPO_META.read_text(encoding="utf-8"))
|
|
except (OSError, json.JSONDecodeError):
|
|
return {}
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|
linked = {
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repo_from_url(url)
|
|
for entry in cve_entries
|
|
for url in entry["poc"]
|
|
if repo_from_url(url)
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|
}
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|
return {name: value for name, value in stored.items() if name in linked}
|
|
|
|
|
|
def load_dates() -> Dict[str, list]:
|
|
"""When the CVE Program first published each record and last changed it."""
|
|
try:
|
|
return json.loads(DATES_INPUT.read_text(encoding="utf-8"))
|
|
except (OSError, json.JSONDecodeError):
|
|
return {}
|
|
|
|
|
|
def build_kev(cve_entries: List[Dict[str, object]]) -> Dict[str, object]:
|
|
"""CISA's known-exploited entries, limited to CVEs the index carries."""
|
|
try:
|
|
stored = json.loads(KEV_INPUT.read_text(encoding="utf-8"))
|
|
except (OSError, json.JSONDecodeError):
|
|
return {}
|
|
have = {str(entry["cve"]) for entry in cve_entries}
|
|
return {cve: value for cve, value in stored.items() if cve in have}
|
|
|
|
|
|
def build_nuclei(cve_entries: List[Dict[str, object]]) -> Dict[str, object]:
|
|
"""Severity, CVSS and CWE per CVE, limited to the ones indexed."""
|
|
try:
|
|
stored = json.loads(NUCLEI_INPUT.read_text(encoding="utf-8"))
|
|
except (OSError, json.JSONDecodeError):
|
|
return {}
|
|
have = {str(entry["cve"]) for entry in cve_entries}
|
|
keep = ("severity", "cvss", "cvss_vector", "cwe")
|
|
return {
|
|
cve: {field: value[field] for field in keep if field in value}
|
|
for cve, value in stored.items()
|
|
if cve in have
|
|
}
|
|
|
|
|
|
def build_metadata(cve_entries: List[Dict[str, object]]) -> Dict[str, object]:
|
|
"""CVSS generations and vetted advisories for CVEs published on the site."""
|
|
have = {str(entry["cve"]) for entry in cve_entries}
|
|
published: Dict[str, object] = {}
|
|
for cve, value in load_metadata().items():
|
|
if cve not in have or not isinstance(value, dict):
|
|
continue
|
|
entry: Dict[str, object] = {}
|
|
if value.get("cvss"):
|
|
entry["cvss"] = value["cvss"]
|
|
advisories = dedupe_advisories(value.get("advisories", []), cve)
|
|
if advisories:
|
|
entry["advisories"] = advisories
|
|
if entry:
|
|
published[cve] = entry
|
|
return published
|
|
|
|
|
|
def build_epss(cve_entries: List[Dict[str, object]]) -> Dict[str, object]:
|
|
"""FIRST's exploitation probability, limited to the CVEs indexed.
|
|
|
|
EPSS answers the question the PoC count cannot: of everything with exploit
|
|
code published, which is actually being used. The feed covers essentially
|
|
the whole index, so it is fetched here rather than tracked in the
|
|
repository, where a daily rescore of 366,000 rows would be pure churn.
|
|
|
|
A failure raises rather than returning {}. Swallowing it published an empty
|
|
epss.json, which is not "EPSS is missing" to a reader: every score silently
|
|
disappears from 82,000 pages and the site looks like it never had them. A
|
|
build that cannot get the feed should not replace the one that did.
|
|
"""
|
|
try:
|
|
with urllib.request.urlopen(EPSS_FEED, timeout=180) as response:
|
|
raw = gzip.decompress(response.read()).decode("utf-8", "replace")
|
|
except Exception as problem:
|
|
raise RuntimeError(f"EPSS feed unavailable: {problem}") from problem
|
|
have = {str(entry["cve"]) for entry in cve_entries}
|
|
text = io.StringIO(raw)
|
|
text.readline() # the feed opens with a model version comment, not a header
|
|
scores: Dict[str, object] = {}
|
|
for row in csv.DictReader(text):
|
|
cve = (row.get("cve") or "").strip().upper()
|
|
if cve not in have:
|
|
continue
|
|
try:
|
|
scores[cve] = [round(float(row["epss"]), 5), round(float(row["percentile"]), 4)]
|
|
except (KeyError, TypeError, ValueError):
|
|
continue
|
|
# The feed normally covers the whole index. A truncated or reshaped one
|
|
# parses cleanly and yields a handful of rows, which would ship as a real
|
|
# build; anything below nine in ten CVEs is a broken feed, not news.
|
|
if have and len(scores) < 0.9 * len(have):
|
|
raise RuntimeError(
|
|
f"EPSS feed covered {len(scores):,} of {len(have):,} indexed CVEs; "
|
|
"refusing to publish a partial rescore"
|
|
)
|
|
return scores
|
|
|
|
|
|
def build_trending(blacklist: Collection[str]) -> List[Dict[str, object]]:
|
|
"""The trending job's own output, minus anything the blacklist covers."""
|
|
try:
|
|
rows = json.loads(TRENDING_INPUT.read_text(encoding="utf-8"))
|
|
except (OSError, json.JSONDecodeError):
|
|
return []
|
|
return [
|
|
row for row in rows
|
|
if row.get("url") and not is_blacklisted(str(row["url"]), blacklist)
|
|
]
|
|
|
|
|
|
def write_json(path: Path, data, *, indent: Optional[int] = None) -> None:
|
|
path.parent.mkdir(parents=True, exist_ok=True)
|
|
with path.open("w", encoding="utf-8") as handle:
|
|
json.dump(data, handle, ensure_ascii=False, indent=indent,
|
|
separators=None if indent else (",", ":"))
|
|
|
|
|
|
def main() -> int:
|
|
argparse.ArgumentParser(description="Build the CVE PoC site data files").parse_args()
|
|
|
|
DOCS_DIR.mkdir(parents=True, exist_ok=True)
|
|
blacklist = load_blacklist()
|
|
|
|
cve_payload, total_cves = build_cve_list(blacklist)
|
|
write_json(CVE_OUTPUT, cve_payload)
|
|
|
|
repo_meta = build_repo_meta(cve_payload)
|
|
write_json(REPO_META_OUTPUT, repo_meta)
|
|
|
|
kev = build_kev(cve_payload)
|
|
write_json(KEV_OUTPUT, kev)
|
|
|
|
nuclei = build_nuclei(cve_payload)
|
|
write_json(NUCLEI_OUTPUT, nuclei)
|
|
|
|
metadata = build_metadata(cve_payload)
|
|
write_json(METADATA_OUTPUT, metadata)
|
|
write_json(CVSS_OUTPUT, {cve: value["cvss"] for cve, value in metadata.items() if value.get("cvss")})
|
|
write_json(ADVISORIES_OUTPUT, {cve: value["advisories"] for cve, value in metadata.items() if value.get("advisories")})
|
|
|
|
epss = build_epss(cve_payload)
|
|
write_json(EPSS_OUTPUT, epss)
|
|
|
|
trending_items = build_trending(blacklist)
|
|
write_json(
|
|
TRENDING_OUTPUT,
|
|
{
|
|
"generated": datetime.now(timezone.utc).isoformat(),
|
|
"total_cves": total_cves,
|
|
"with_pocs": len(cve_payload),
|
|
"items": trending_items,
|
|
},
|
|
indent=2,
|
|
)
|
|
|
|
print(
|
|
f"Wrote {CVE_OUTPUT.name} ({len(cve_payload)} of {total_cves} CVEs), "
|
|
f"{REPO_META_OUTPUT.name} ({len(repo_meta)} repositories), "
|
|
f"{KEV_OUTPUT.name} ({len(kev)} known-exploited), "
|
|
f"{NUCLEI_OUTPUT.name} ({len(nuclei)} rated), "
|
|
f"{METADATA_OUTPUT.name} ({len(metadata)} enriched), "
|
|
f"{EPSS_OUTPUT.name} ({len(epss)} scored) and {TRENDING_OUTPUT.name}"
|
|
)
|
|
return 0
|
|
|
|
|
|
if __name__ == "__main__":
|
|
raise SystemExit(main())
|