fix(cve): enrich CVEs with severity/vector from Debian Security Tracker HTML

- debsecan default format has no [remote|local] or [severity] flags
- Now fetches severity and vector from security-tracker.debian.org HTML
- scan_cve uses default format (no --format report)
- enrich_cves replaces filter_actionable_cves, adds severity+vector

full_updater/backend/scanner.py

@@ -41,6 +41,29 @@ def _fetch_cve_html(cve_id: str) -> str:
         return ""
 
 
+def _enrich_cve(cve_id: str) -> dict[str, str]:
+    """Récupère la sévérité et le vecteur d'attaque depuis le HTML Debian Security Tracker."""
+    html = _fetch_cve_html(cve_id)
+    if not html:
+        return {"severity": "?", "vector": "?"}
+
+    result = {"severity": "?", "vector": "?"}
+
+    # Extraction de la sévérité depuis le bloc "Vulnerable and fixed packages"
+    # Recherche du motif: <td>remote</td> ou <td>local</td>
+    vector_match = re.search(r'<td[^>]*>\s*(remote|local)\s*</td>', html, re.IGNORECASE)
+    if vector_match:
+        result["vector"] = vector_match.group(1).lower()
+
+    # Extraction de la sévérité depuis les notes ou le tableau
+    # Format courant: [low], [medium], [high], [critical] dans les notes
+    severity_match = re.search(r'\b(unimportant|low|medium|high|critical)\b', html, re.IGNORECASE)
+    if severity_match:
+        result["severity"] = severity_match.group(1).lower()
+
+    return result
+
+
 def _is_cve_actionable(cve_id: str, suite: str = "bookworm") -> bool:
     """Retourne True si la CVE est marquée 'fixed' pour le suite donné dans le HTML."""
     html = _fetch_cve_html(cve_id)
@@ -54,16 +77,20 @@ def _is_cve_actionable(cve_id: str, suite: str = "bookworm") -> bool:
     return bool(pattern.search(html))
 
 
-def filter_actionable_cves(cves: list[dict]) -> tuple[list[dict], int]:
-    """Filtre la liste des CVE pour ajouter un flag 'fixable'.
-    Retourne (cve_avec_flag, nombre_actionnables)."""
+def enrich_cves(cves: list[dict]) -> tuple[list[dict], int]:
+    """Enrichit les CVEs avec fixable, severity, vector via l'API Debian.
+    Retourne (cve_enrichies, nombre_actionnables)."""
     if not cves:
         return [], 0
 
     def check(cve: dict) -> dict:
         try:
-            is_fixable = _is_cve_actionable(cve["id"])
-            cve["fixable"] = is_fixable
+            # Vérifie si corrigeable
+            cve["fixable"] = _is_cve_actionable(cve["id"])
+            # Enrichit avec severity et vector
+            enriched = _enrich_cve(cve["id"])
+            cve["severity"] = enriched["severity"]
+            cve["vector"] = enriched["vector"]
             return cve
         except Exception:
             cve["fixable"] = False
@@ -219,30 +246,21 @@ def scan_apt(target: Target) -> tuple[bool, list[dict[str, str]], str]:
 
 
 def scan_cve(target: Target) -> tuple[bool, list[dict[str, str]], str]:
-    cmd = ["debsecan", "--format", "report", "--suite", "bookworm"] if target.is_host else ["pct", "exec", target.target_id, "--", "debsecan", "--format", "report", "--suite", "bookworm"]
+    # Format par défaut (pas de --format) retourne: CVE-ID package
+    cmd = ["debsecan", "--suite", "bookworm"] if target.is_host else ["pct", "exec", target.target_id, "--", "debsecan", "--suite", "bookworm"]
     ok, stdout, stderr = run_cmd(cmd, timeout=120)
     if not ok:
         return False, [], stderr or stdout
 
     cves = []
     for line in stdout.splitlines():
-        # Format: CVE-XXXX-XXXX package [remote|local] [severity] - description
         m = re.match(r"(CVE-\d{4}-\d+)\s+(\S+)", line)
         if m:
-            # Extraire tous les flags entre crochets
-            flags = re.findall(r"\[(\w+)\]", line)
-            vector = "?"
-            severity = "?"
-            for f in flags:
-                if f in ("remote", "local"):
-                    vector = f
-                elif f in ("unimportant", "low", "medium", "high", "critical"):
-                    severity = f
             cves.append({
                 "id": m.group(1),
                 "package": m.group(2),
-                "vector": vector,
-                "severity": severity,
+                "vector": "?",
+                "severity": "?",
                 "url": f"https://security-tracker.debian.org/tracker/{m.group(1)}"
             })
     return True, cves, ""
@@ -273,9 +291,9 @@ def scan_target(target: Target, progress_cb: Callable) -> ScanResult:
         if not cve_ok:
             result.error = cve_err
 
-        # Filtrer les CVE actionnables via l'API Debian
+        # Enrichir les CVE via l'API Debian (severity, vector, fixable)
         if cve_list:
-            all_cves, actionable_count = filter_actionable_cves(cve_list)
+            all_cves, actionable_count = enrich_cves(cve_list)
             result.cve_list = all_cves
             result.cve_count = actionable_count
             result.cve_total = len(all_cves)