Alert GCSA-21086 - Microsoft Security Update Agosto 2021
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alert ID: GCSA-21086
data: 11 agosto 2021
titolo: Microsoft Security Update Agosto 2021
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:: Descrizione del problema
Microsoft ha rilasciato il security update mensile per agosto 2021,
questa versione risolve 51 vulnerabilita', delle quali 7
sono classificate come "critiche".
E' stato confermato che le seguente vulnerabilita' e' in corso di sfruttamento:
CVE-2021-36948 Windows Update Medic Service elevation of privilege vulnerability
esistono anche altre due vulnerabilita' di tipo zero-day divulgate
pubblicamente:
CVE-2021-36936 Windows Print Spooler remote code execution vulnerability
CVE-2021-36942 Windows LSA spoofing vulnerability
Maggiori dettagli sono disponibili alla sezione "Riferimenti".
:: Software interessato
.NET Core & Visual Studio
ASP .NET
Azure
Azure Sphere
Microsoft Azure Active Directory Connect
Microsoft Dynamics
Microsoft Graphics Component
Microsoft Office
Microsoft Office SharePoint
Microsoft Office Word
Microsoft Scripting Engine
Microsoft Windows Codecs Library
Remote Desktop Client
Windows Bluetooth Service
Windows Cryptographic Services
Windows Defender
Windows Event Tracing
Windows Media
Windows MSHTML Platform
Windows NTLM
Windows Print Spooler Components
Windows Services for NFS ONCRPC XDR Driver
Windows Storage Spaces Controller
Windows TCP/IP
Windows Update
Windows Update Assistant
Windows User Profile Service
:: Impatto
Esecuzione remota di codice arbitrario (RCE)
Denial of Service (DoS)
Acquisizione di privilegi piu' elevati (EoP)
Provide Misleading Information (spoofing)
Information Disclosure (ID)
Bypass delle funzionalita' di sicurezza (SFB)
:: Soluzioni
Per default l'installazione degli aggiornamenti
avviene in maniera automatica.
Per installare manualmente scegliere
Start > Impostazioni > Aggiornamento e Sicurezza > Windows Update
Verificare di aver installato la versione piu' recente del
Servicing Stack Updates
https://msrc.microsoft.com/update-guide/en-us/vulnerability/ADV990001
https://docs.microsoft.com/it-it/windows/deployment/update/servicing-stack-updates
Windows Update domande frequenti
https://support.microsoft.com/en-us/help/12373/windows-update-faq
Gli aggiornamenti sono disponibili anche tramite il catalogo di Microsoft Update
https://www.catalog.update.microsoft.com/
Gli utenti che utilizzano ancora Windows 7, Windows Server 2008 o 2008 R2
devono acquistare l'Extended Security Update per continuare a ricevere gli aggiornamenti
https://support.microsoft.com/en-hk/help/4522133/procedure-to-continue-receiving-security-updates
:: Riferimenti
Microsoft Security Updates - Release Notes
https://msrc.microsoft.com/update-guide/releaseNote/2021-Aug
ISC SANS
https://isc.sans.edu/forums/diary/Microsoft+August+2021+Patch+Tuesday/27736/
Krebs on Security
https://krebsonsecurity.com/2021/08/microsoft-patch-tuesday-august-2021-edition/
The Hacker News
https://thehackernews.com/2021/08/microsoft-releases-windows-updates-to.html
SecurityWeek
https://www.securityweek.com/microsoft-patch-tuesday-windows-flaw-under-active-attack
Mitre CVE
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26423
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26424
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26425
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26426
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26428
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26429
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26430
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26431
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26432
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26433
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30590
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30591
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30592
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30593
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30594
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30596
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30597
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33762
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34471
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34478
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34480
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34483
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34484
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34485
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34486
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34487
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34524
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34530
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34532
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34533
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34534
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34535
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34536
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34537
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36926
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36927
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36932
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36933
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36936
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36937
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36938
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36940
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36941
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36942
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36943
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36945
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36946
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36947
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36948
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36949
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36950
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