Detection stack
- AIDR
- Alert
- ETL
- Query
Analyse
CVE‑2025‑62215 ist eine kritische Race-Condition-Schwachstelle im Windows-Kernel, die von Microsoft in seiner Patch Tuesday-Veröffentlichung im November 2025 behoben wurde. SOC Prime Die Schwachstelle ermöglicht einem Angreifer mit niedrig privilegiertem lokalem Zugriff die Ausnutzung einer „Double-Free“-Bedingung im Kernel-Speicher und die Eskalation von Privilegien auf SYSTEM-Ebene. SOC Prime Da sie aktiv ausgenutzt wird und alle unterstützten Windows-Betriebssystemeditionen (und ESU für Windows 10) betrifft, besteht für Organisationen ein reales Risiko einer vollständigen Systemkompromittierung.
Untersuchung
Sicherheitsforscher entdeckten, dass die Schwachstelle von einer Race Condition herrührt, bei der mehrere Threads ohne ordnungsgemäße Synchronisierung auf dieselbe Kernel-Ressource zugreifen, was ein Szenario einer Kernel-Speicherbeschädigung („Double-Free“) auslöst, das Angreifern ermöglicht, den Ausführungsfluss zu übernehmen. Auch wenn ein initialer Zugriff vorhanden sein muss (z.B. durch Phishing oder frühere RCE), wird der Exploit dann verwendet, um Privilegien zu erhöhen, Anmeldedaten zu ernten und die seitliche Bewegung zu erleichtern. Da das Konzept des Exploits einfach, aber seine Auswirkungen mächtig sind, wird er bereits im Feld verwendet.
Abmilderung
Organisationen müssen den von Microsoft bereitgestellten Patch für CVE‑2025‑62215 sofortanwenden. Darüber hinaus sollte das Risiko eines anfänglichen Zugangs durch die Durchsetzung von Benutzerzugriff mit minimalen Rechten, die Deaktivierung unnötiger lokaler Administratorrechte und die Überwachung ungewöhnlicher lokaler Privilegieneskalationen verringert werden. Verteidiger sollten Endpunkt-Erkennungsregeln bereitstellen, die darauf abzielen, Speicherbeschädigungen oder ungewöhnliche Prozess-Erstellungen von Kernel-Level-Service-Konten zu erkennen. Angesichts der kernelbasierten Natur der Schwachstelle ist es entscheidend, eine robuste Patch-Disziplin beizubehalten und geschichtete Sicherheitskontrollen zu verwenden (z.B. EDR, Kernel-Integritätsprüfungen).
Reaktion
Wenn Sie vermuten, dass Ihr Umfeld über diese Schwachstelle ausgenutzt wurde, isolieren Sie potenziell betroffene Hosts, überprüfen Sie letzte lokale Anmeldungen und Privilegieneskalationsereignisse und suchen Sie nach Anzeichen von Token-Imitation oder SYSTEM-Level-Prozess-Sporen. Setzen Sie betroffene Geräte bei Bedarf zurück und ändern Sie Anmeldeinformationen für Konten, die möglicherweise kompromittiert wurden. Berichten Sie Vorfalldetails an Ihr Sicherheitsoperationsteam und aktualisieren Sie Ihre Erkennungs-/Jagdspielpläne, um die Exploit-Kette dieser Schwachstelle einzuschließen (initialer Zugriff → lokaler Exploit → Kernel-Privilegieneskalation). Stellen Sie schließlich sicher, dass zukünftige Patch-Zyklen die Überprüfung der Installation und die Überwachung von Wiederverwendungsversuchen umfassen.
Angriffsfluss
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Benachrichtige michErkennungsregeln
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Benachrichtige michNutzlastanweisungen
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