vulncheck
dbad9a365e
Renames the product name in every user-visible surface and internal self-reference: page title, nav/shell, login/MFA pages, email templates and subject prefixes ([VULNCHECK] → [TRUEVULN]), TOTP issuer label, report/PDF headers, notification previews, outbound User-Agent/HTTP-Referer headers we set ourselves, docs (README, ARCHITECTURE, PROJECT_OVERVIEW, DATABASE_SCHEMA, README.DEV, TROUBLESHOOTING is untouched — see below), and .env.example placeholder config (LDAP/OIDC/SAML example domains and paths). Also renamed the on-disk cache file paths (/tmp/vulncheck-*.zip|csv|json → /tmp/truevuln-*), kept consistent across the two files that share the cvelistV5 ZIP cache path — first run after deploy re-downloads that ~557 MB cache once (harmless, disposable). Deliberately LEFT UNCHANGED (not branding — real external references or infra identifiers; renaming the text without renaming the underlying thing would just break/mislead): - The actual Gitea repo URL/path (gitea.isuit.ch/vulncheck/vulncheck) and the README lines derived from it (git clone target dir, tree listing) — a real repo rename is a manual Gitea-side step (Settings → repository name) the user would need to do themselves, and existing clones would need `git remote set-url` after. - The real support mailbox (support-vulncheck.sq9vd@passmail.net, in both README and TROUBLESHOOTING) and the Buy Me A Coffee link — both point to accounts that still exist under the old name; renaming the text alone wouldn't create new ones. - GitNexus MCP resource URIs in CLAUDE.md/AGENTS.md (gitnexus://repo/ vulncheck/...) — tied to GitNexus's own index name for this repo, not our branding; those files are untracked in this repo anyway. - docker-compose.yml container/network/Postgres user+db names (vulnmanager-*) — explicit user decision: infra naming carries real deploy/data risk on an already-running instance and isn't part of the product-branding ask. - The Tailwind color token class `vulncheck-blue` (frontend/app/globals.css) — invisible internal CSS variable name, renaming it would touch ~270 className occurrences for zero user-visible benefit. Verified: backend py_compile clean on every touched .py file; frontend tsc clean (two pre-existing, unrelated errors remain: assets/page.tsx SVG title prop, mfa-setup missing qrcode.react types). All diffs are exact-string renames — no other changes riding along.
604 lines
22 KiB
Python
604 lines
22 KiB
Python
"""
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Microsoft 365 Apps CVE detection (Plan P).
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Microsoft 365 Apps (formerly Office 365 ProPlus) security fixes are NOT
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published to NVD and are NOT detected by Wazuh's vulnerability detector —
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they only live on one human-readable Microsoft Learn page:
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https://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
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There is no Microsoft API. So we parse that page, learn the latest patched
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build per update channel, compare it against the build Wazuh's syscollector
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reports as installed, and create real-CVE vulnerability rows for every
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monthly update the host is behind on.
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Build logic (verified against the tester's example):
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installed 16.0.19929.20172 vs Monthly Enterprise Channel 19929.20162
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-> 20172 >= 20162 -> UNAFFECTED (no CVEs)
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installed < a section's channel build -> AFFECTED -> attach that
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section's CVEs (union across every section the host is behind on).
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Channel mapping (tester's rule): the deployed channel isn't in the
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syscollector name, so we approximate it from the product name —
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"...enterprise..." -> Monthly Enterprise Channel, else Current Channel.
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"""
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import json
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import logging
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import re
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from datetime import datetime, timedelta
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from typing import Dict, List, Optional, Tuple
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import httpx
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import lxml.html
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from sqlalchemy.orm import Session
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from app.models.setting import Setting
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logger = logging.getLogger(__name__)
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M365_SECURITY_URL = (
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"https://learn.microsoft.com/en-us/officeupdates/"
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"microsoft365-apps-security-updates"
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)
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# ---------- cache (settings table) ----------
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M365_CACHE_KEY = "m365_security_cache"
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M365_CACHE_TS_KEY = "m365_security_cache_updated_at"
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M365_TTL_HOURS = 24
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# ---------- toggle ----------
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SETTING_M365_ENABLED = "m365_detection_enabled"
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HTTP_TIMEOUT = 30.0
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# Build line: "Monthly Enterprise Channel: Version 2604 (Build 19929.20162)"
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_BUILD_RE = re.compile(
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r"([A-Za-z0-9()/ \-]+?):\s*Version\s+(\d{3,4})\s*\(\s*Build\s+(\d+\.\d+)\s*\)"
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)
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# Month-day-year heading that delimits each monthly section.
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_DATE_RE = re.compile(
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r"\b(January|February|March|April|May|June|July|August|September|"
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r"October|November|December)\s+(\d{1,2}),\s+(\d{4})\b"
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)
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_CVE_RE = re.compile(r"CVE-\d{4}-\d{4,}", re.IGNORECASE)
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# Product-name -> channel approximation.
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CHANNEL_MONTHLY_ENTERPRISE = "Monthly Enterprise Channel"
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CHANNEL_CURRENT = "Current Channel"
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class M365Error(Exception):
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"""Raised when the M365 security page cannot be fetched/parsed."""
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# ============================================================
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# build helpers
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# ============================================================
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def parse_build(version: str) -> Optional[Tuple[int, int]]:
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"""'16.0.19929.20172' or '19929.20172' -> (19929, 20172).
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Microsoft 365 build numbers are the last two dotted segments
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(BBBBB.RRRRR). The leading '16.0.' is the Office major and is
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constant, so we ignore it.
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"""
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if not version:
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return None
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nums = re.findall(r"\d+", version)
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if len(nums) < 2:
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return None
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try:
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return int(nums[-2]), int(nums[-1])
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except ValueError:
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return None
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def channel_for_product(product_name: str) -> str:
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"""Tester's rule: name contains 'enterprise' -> MEC, else Current."""
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return (
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CHANNEL_MONTHLY_ENTERPRISE
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if "enterprise" in (product_name or "").lower()
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else CHANNEL_CURRENT
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)
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def is_m365_apps(product_name: str) -> bool:
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"""True for syscollector entries like 'Microsoft 365 Apps for enterprise'."""
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n = (product_name or "").lower()
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return "microsoft 365 apps" in n or "office 365 proplus" in n
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# ============================================================
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# page fetch + parse
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# ============================================================
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def _parse_security_page(html: str) -> List[dict]:
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"""Parse the MS365 security page into a list of monthly releases.
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Each release: {
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"date": "May 12, 2026",
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"channel_builds": {channel_name: [(major, rev), ...]}, # max = newest
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"cves": ["CVE-2026-40361", ...], # every CVE in the section
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}
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Releases are returned in page order (newest first).
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"""
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# Flatten to text in document order. The page is a linear sequence of
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# date headings -> channel/build lines -> product headings -> CVE
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# bullets, so segmenting the flattened text by date heading is robust
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# against markup churn.
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doc = lxml.html.fromstring(html)
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for bad in doc.xpath("//script | //style | //nav | //header | //footer"):
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bad.getparent().remove(bad)
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body = doc.xpath("//main") or [doc]
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text = body[0].text_content()
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# Find date-heading anchors and slice between them.
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matches = list(_DATE_RE.finditer(text))
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releases: List[dict] = []
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for i, m in enumerate(matches):
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start = m.end()
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end = matches[i + 1].start() if i + 1 < len(matches) else len(text)
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section = text[start:end]
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date_label = f"{m.group(1)} {m.group(2)}, {m.group(3)}"
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channel_builds: Dict[str, List[Tuple[int, int]]] = {}
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for bm in _BUILD_RE.finditer(section):
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channel = bm.group(1).strip()
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build = parse_build(bm.group(3))
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if build:
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channel_builds.setdefault(channel, []).append(build)
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if not channel_builds:
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# Not a real release section (e.g. intro paragraph mentioning
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# a date) — skip.
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continue
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cves = sorted({c.upper() for c in _CVE_RE.findall(section)})
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if not cves:
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continue
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releases.append({
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"date": date_label,
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"channel_builds": channel_builds,
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"cves": cves,
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})
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return releases
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def _load_cache(db: Session) -> Optional[List[dict]]:
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ts = db.query(Setting).filter(Setting.key == M365_CACHE_TS_KEY).first()
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cache = db.query(Setting).filter(Setting.key == M365_CACHE_KEY).first()
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if not ts or not cache or not cache.value:
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return None
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try:
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if datetime.now() - datetime.fromisoformat(ts.value) > timedelta(hours=M365_TTL_HOURS):
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return None
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return json.loads(cache.value)
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except (ValueError, json.JSONDecodeError):
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return None
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def _store_cache(db: Session, releases: List[dict]) -> None:
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s = db.query(Setting).filter(Setting.key == M365_CACHE_KEY).first()
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if s:
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s.value = json.dumps(releases)
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else:
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db.add(Setting(key=M365_CACHE_KEY, value=json.dumps(releases),
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description="MS365 Apps security-updates parse cache (24h)"))
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ts = db.query(Setting).filter(Setting.key == M365_CACHE_TS_KEY).first()
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if ts:
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ts.value = datetime.now().isoformat()
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else:
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db.add(Setting(key=M365_CACHE_TS_KEY, value=datetime.now().isoformat(),
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description="Timestamp of last MS365 page parse"))
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db.commit()
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def fetch_security_data(db: Session, force_refresh: bool = False) -> List[dict]:
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"""Return parsed monthly releases, cached 24h in the settings table."""
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if not force_refresh:
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cached = _load_cache(db)
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if cached is not None:
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return cached
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try:
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with httpx.Client(timeout=HTTP_TIMEOUT, follow_redirects=True,
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headers={"User-Agent": "TrueVuln/1.0"}) as client:
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resp = client.get(M365_SECURITY_URL)
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resp.raise_for_status()
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html = resp.text
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except httpx.HTTPError as e:
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raise M365Error(f"could not fetch MS365 security page: {e}") from e
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releases = _parse_security_page(html)
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if not releases:
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raise M365Error("MS365 page parsed to zero releases — layout changed?")
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_store_cache(db, releases)
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logger.info("MS365: parsed %d monthly releases", len(releases))
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return releases
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# ============================================================
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# detection
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# ============================================================
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def _channel_max(release: dict, channel: str) -> Optional[Tuple[int, int]]:
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"""Newest (max) build for `channel` in a release, as a tuple."""
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builds = release.get("channel_builds", {}).get(channel)
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if not builds:
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return None
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# builds may be lists from JSON -> normalise to tuples
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return max(tuple(b) for b in builds)
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def detect_missing_cves(
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releases: List[dict],
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*,
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installed_version: str,
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channel: str,
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) -> dict:
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"""Compare an installed M365 build against the parsed releases.
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Returns {
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"affected": bool,
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"installed_build": "19929.20172" or None,
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"latest_build": "19929.20162" or None, # newest patched, this channel
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"missing_cves": [ ... ], # union, deduped
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"behind_releases": [ "May 12, 2026", ... ],
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}
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"""
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out = {
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"affected": False,
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"installed_build": None,
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"latest_build": None,
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"missing_cves": [],
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"behind_releases": [],
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}
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installed = parse_build(installed_version)
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if not installed:
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return out
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out["installed_build"] = f"{installed[0]}.{installed[1]}"
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# Newest patched build for this channel across the whole page.
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channel_builds = [b for r in releases if (b := _channel_max(r, channel))]
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if not channel_builds:
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return out
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latest = max(channel_builds)
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out["latest_build"] = f"{latest[0]}.{latest[1]}"
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if installed >= latest:
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return out # fully patched -> unaffected
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# Behind: union CVEs from every section whose channel build the host
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# has not reached.
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out["affected"] = True
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cve_set: set = set()
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for r in releases:
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b = _channel_max(r, channel)
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if b and installed < b:
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cve_set.update(r.get("cves", []))
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out["behind_releases"].append(r.get("date"))
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out["missing_cves"] = sorted(cve_set)
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return out
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def upsert_m365_vulnerability(
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db: Session,
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*,
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asset_id: int,
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cve_id: str,
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product_name: str,
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installed_version: str,
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fixed_build: Optional[str],
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) -> Tuple[Optional[int], bool]:
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"""Create/refresh a real-CVE M365 vuln row. Returns (id, was_created).
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CVSS/severity are left as a neutral placeholder; the nightly
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enrichment (EPSS/KEV/NVD dates) and the Correct-CVSS job refine them.
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These are real CVE ids, so they enrich like any other CVE.
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"""
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from app.models.vulnerability import (
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Vulnerability, VulnerabilitySeverity, VulnerabilityStatus,
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)
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cve_id = cve_id.upper()
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existing = (
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db.query(Vulnerability)
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.filter(Vulnerability.cve_id == cve_id, Vulnerability.asset_id == asset_id)
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.first()
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)
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title = f"{product_name} — {cve_id} (Microsoft 365 Apps security update)"
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desc = (
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f"{cve_id} affects {product_name} and is fixed by a Microsoft 365 "
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f"Apps security update not yet applied on this host.\n"
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f"Installed build: {installed_version}. Fixed in build: "
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f"{fixed_build or 'unknown'} or later — update via the configured "
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f"Office update channel.\n\n"
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f"Detection source: this finding comes from the host's installed "
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f"Microsoft 365 Apps build (Wazuh syscollector inventory) compared "
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f"against the Microsoft 365 Apps security-updates release notes — "
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f"M365 Apps fixes are NOT published to NVD and are NOT seen by "
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f"Wazuh's vulnerability detector.\n"
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f"Severity / CVSS / dates are enriched from MSRC + CISA Vulnrichment "
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f"/ cvelistV5 for this real CVE id (see the Remediation section for "
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f"the Microsoft (MSRC) KB / advisory details)."
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)
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if existing:
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existing.title = title[:500]
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existing.description = desc
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existing.package_name = product_name[:255]
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existing.package_version = installed_version[:100]
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existing.fixed_version = (fixed_build or None)
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if existing.status == VulnerabilityStatus.patched:
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existing.status = VulnerabilityStatus.open
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existing.patched_at = None
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existing.detected_at = datetime.now()
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try:
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existing.refresh_scores()
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except Exception:
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pass
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return existing.id, False
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vuln = Vulnerability(
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cve_id=cve_id,
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asset_id=asset_id,
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cvss_score=None,
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severity=VulnerabilitySeverity.medium, # placeholder; enrichment refines
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status=VulnerabilityStatus.open,
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title=title[:500],
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description=desc,
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package_name=product_name[:255],
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package_version=installed_version[:100],
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fixed_version=(fixed_build or None),
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detected_at=datetime.now(),
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sources='["microsoft365-apps"]',
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first_detected_by="m365_check",
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)
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db.add(vuln)
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db.flush()
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try:
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vuln.refresh_scores()
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except Exception:
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pass
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# Revisionssicher: initial detected-event for the new M365 finding.
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try:
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from app.services.audit_events import audit_new_vulnerabilities
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audit_new_vulnerabilities(db, [vuln.id], source="m365_check")
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except Exception:
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pass
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return vuln.id, True
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# ============================================================
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# orchestration (shared by the endpoint and the nightly job)
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# ============================================================
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def run_m365_check(db: Session, wazuh, asset_id: Optional[int] = None) -> dict:
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"""Walk Wazuh-linked assets, detect M365-Apps CVE exposure, upsert rows.
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`wazuh` is an already-configured WazuhClient (the caller owns its
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lifecycle, matching the eol-check pattern).
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"""
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from app.models.asset import Asset
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releases = fetch_security_data(db)
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q = db.query(Asset).filter(Asset.wazuh_agent_id.isnot(None))
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if asset_id is not None:
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q = q.filter(Asset.id == asset_id)
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assets = q.all()
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stats = {
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"assets_scanned": 0,
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"m365_installs": 0,
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"assets_affected": 0,
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"cve_findings_total": 0,
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"cve_findings_new": 0,
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"releases_parsed": len(releases),
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"errors": [],
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}
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touched_cves: set = set()
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for asset in assets:
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try:
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pkgs = wazuh.get_packages(asset.wazuh_agent_id) or []
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except Exception as e:
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stats["errors"].append(f"asset {asset.id} ({asset.hostname}): {e}")
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continue
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stats["assets_scanned"] += 1
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# An asset can list the same product per language pack (de-de,
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# en-us, .proof, ...) — collapse to one detection per build.
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seen_builds: set = set()
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asset_affected = False
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for pkg in pkgs:
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name = (pkg.get("name") or "").strip()
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version = (pkg.get("version") or "").strip()
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if not name or not version or not is_m365_apps(name):
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continue
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stats["m365_installs"] += 1
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channel = channel_for_product(name)
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key = (channel, version)
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if key in seen_builds:
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continue
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seen_builds.add(key)
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result = detect_missing_cves(
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releases, installed_version=version, channel=channel
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)
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if not result["affected"]:
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continue
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asset_affected = True
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for cve_id in result["missing_cves"]:
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try:
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_, created = upsert_m365_vulnerability(
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db,
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asset_id=asset.id,
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cve_id=cve_id,
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product_name=name,
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installed_version=version,
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fixed_build=result["latest_build"],
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)
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stats["cve_findings_total"] += 1
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touched_cves.add(cve_id.upper())
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if created:
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stats["cve_findings_new"] += 1
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except Exception as e:
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logger.warning(
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"M365 upsert failed (%s on asset %s): %s",
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cve_id, asset.id, e,
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)
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if asset_affected:
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stats["assets_affected"] += 1
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db.commit()
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|
|
# Pull real metrics for the M365 CVEs right at check-in: these are real
|
|
# CVE ids absent from Wazuh/NVD, so the CVSS/severity placeholder is
|
|
# corrected from the vulnrichment → cvelistV5 → NVD cascade, and dates
|
|
# via the enrichment service. The custom source note in `description`
|
|
# is preserved (the override path never touches description).
|
|
if touched_cves:
|
|
cve_list = sorted(touched_cves)
|
|
try:
|
|
from app.services.vuln_override_service import correct_vulnerability_scores
|
|
cstats = correct_vulnerability_scores(db, cve_ids=cve_list)
|
|
stats["cvss_corrected"] = cstats.get("updated", 0)
|
|
except Exception as e:
|
|
logger.warning("M365: CVSS correction failed (non-fatal): %s", e)
|
|
try:
|
|
from app.models.vulnerability import Vulnerability
|
|
from app.services.enrichment_service import enrich_vulnerabilities
|
|
fresh = db.query(Vulnerability).filter(Vulnerability.cve_id.in_(cve_list)).all()
|
|
if fresh:
|
|
enrich_vulnerabilities(db, fresh) # EPSS/KEV/EUVD + NVD dates
|
|
except Exception as e:
|
|
logger.warning("M365: enrichment failed (non-fatal): %s", e)
|
|
try:
|
|
stats["meta_filled"] = apply_real_cve_metadata(db, cve_list)
|
|
except Exception as e:
|
|
logger.warning("M365: real CVE metadata fill failed (non-fatal): %s", e)
|
|
|
|
logger.info(
|
|
"M365 check: %d assets scanned, %d installs, %d affected, "
|
|
"%d CVE rows (%d new), %d cvss-corrected",
|
|
stats["assets_scanned"], stats["m365_installs"],
|
|
stats["assets_affected"], stats["cve_findings_total"],
|
|
stats["cve_findings_new"], stats.get("cvss_corrected", 0),
|
|
)
|
|
return stats
|
|
|
|
|
|
_M365_SOURCE_NOTE = (
|
|
"\n\n— Detected via the Microsoft 365 Apps security-updates page "
|
|
"(installed build vs. patched channel build; not published to NVD and "
|
|
"not seen by Wazuh). Title/description from CVE.org cvelistV5; "
|
|
"severity/CVSS/dates via MSRC + CISA Vulnrichment."
|
|
)
|
|
|
|
|
|
def _fetch_cve_title_desc(cve_id: str) -> Tuple[Optional[str], Optional[str]]:
|
|
"""Real CVE title + English description from CVE.org cvelistV5 raw."""
|
|
m = re.fullmatch(r"CVE-(\d{4})-(\d+)", cve_id.upper())
|
|
if not m:
|
|
return None, None
|
|
year, num = m.group(1), m.group(2)
|
|
url = (f"https://raw.githubusercontent.com/CVEProject/cvelistV5/main/"
|
|
f"cves/{year}/{int(num) // 1000}xxx/{cve_id.upper()}.json")
|
|
try:
|
|
with httpx.Client(timeout=15.0, follow_redirects=True,
|
|
headers={"User-Agent": "TrueVuln/1.0"}) as c:
|
|
r = c.get(url)
|
|
if r.status_code != 200:
|
|
return None, None
|
|
cna = (r.json().get("containers") or {}).get("cna") or {}
|
|
except (httpx.HTTPError, ValueError):
|
|
return None, None
|
|
title = cna.get("title")
|
|
desc = None
|
|
for d in cna.get("descriptions") or []:
|
|
if (d.get("lang") or "").lower().startswith("en"):
|
|
desc = d.get("value")
|
|
break
|
|
return title, desc
|
|
|
|
|
|
def apply_real_cve_metadata(db: Session, cve_ids: list) -> int:
|
|
"""Fill the REAL CVE title + description (cvelistV5) on M365 findings,
|
|
keeping a trailing note that the finding originated from the M365 Apps
|
|
source. CVSS-correction deliberately leaves title/description alone, so
|
|
this runs separately. Returns rows updated. Caller commits."""
|
|
from app.models.vulnerability import Vulnerability
|
|
updated = 0
|
|
for cve_id in sorted({c.upper() for c in cve_ids if c}):
|
|
title, desc = _fetch_cve_title_desc(cve_id)
|
|
if not title and not desc:
|
|
continue
|
|
rows = (
|
|
db.query(Vulnerability)
|
|
.filter(
|
|
Vulnerability.cve_id == cve_id,
|
|
Vulnerability.first_detected_by == "m365_check",
|
|
)
|
|
.all()
|
|
)
|
|
for v in rows:
|
|
if title:
|
|
v.title = title[:500]
|
|
if desc:
|
|
v.description = desc.strip() + _M365_SOURCE_NOTE
|
|
updated += 1
|
|
if updated:
|
|
db.commit()
|
|
return updated
|
|
|
|
|
|
def run_m365_for_packages(db: Session, asset, packages: list) -> int:
|
|
"""Source-agnostic M365-Apps CVE detection for one asset's installed
|
|
apps (e.g. Intune detectedApps). Same build-vs-channel logic as
|
|
run_m365_check; pulls real metrics for new CVEs. Returns findings
|
|
upserted. Caller commits."""
|
|
try:
|
|
releases = fetch_security_data(db)
|
|
except M365Error as e:
|
|
logger.debug("M365-for-packages: security data unavailable: %s", e)
|
|
return 0
|
|
|
|
count = 0
|
|
touched: set = set()
|
|
seen: set = set()
|
|
for pkg in packages or []:
|
|
name = (pkg.get("name") or "").strip()
|
|
version = (pkg.get("version") or "").strip()
|
|
if not name or not version or not is_m365_apps(name):
|
|
continue
|
|
channel = channel_for_product(name)
|
|
key = (channel, version)
|
|
if key in seen:
|
|
continue
|
|
seen.add(key)
|
|
result = detect_missing_cves(releases, installed_version=version, channel=channel)
|
|
if not result["affected"]:
|
|
continue
|
|
for cve_id in result["missing_cves"]:
|
|
try:
|
|
upsert_m365_vulnerability(
|
|
db, asset_id=asset.id, cve_id=cve_id, product_name=name,
|
|
installed_version=version, fixed_build=result["latest_build"],
|
|
)
|
|
count += 1
|
|
touched.add(cve_id.upper())
|
|
except Exception as e:
|
|
logger.warning("M365-for-packages upsert failed (%s on asset %s): %s", cve_id, asset.id, e)
|
|
|
|
if touched:
|
|
try:
|
|
from app.services.vuln_override_service import correct_vulnerability_scores
|
|
correct_vulnerability_scores(db, cve_ids=sorted(touched))
|
|
except Exception as e:
|
|
logger.debug("M365-for-packages CVSS correction failed: %s", e)
|
|
try:
|
|
apply_real_cve_metadata(db, sorted(touched))
|
|
except Exception as e:
|
|
logger.debug("M365-for-packages metadata fill failed: %s", e)
|
|
return count
|