Exchange 2016 - Brief of vulnerabilities CVE-2018-8581, CVE-2019-0724 and CVE-2019-0686

January 21, 2019 was published an exploit that exploited 3 vulnerabilities to Exchange. Perhaps this is what accelerated their solving.

History

2017 - Researchers Andy Robbins and Will Schroeder highlighted issues with Exchange permissions in a document "Designing Active Directory DACL Backdoors".
2018.04.26 - Rindert Kramer and Dirk-jan Mollema at published an article "Escalating privileges with ACLs in Active Directory".

2018.11.13 - Microsoft published "CVE-2018-8581 | Microsoft Exchange Server Elevation of Privilege Vulnerability".
2018.12.19.12 - The ZDI published article "AN INSINCERE FORM OF FLATTERY: IMPERSONATING USERS ON MICROSOFT EXCHANGE" with exploit for CVE-2018-8581.
2019.01.21 - Hacker Dirk-jan Mollema published the PoC "Abusing Exchange: One API call away from Domain Admin".
2019.01.28 - CERT Coordination Center published vulnerability note VU#465632 "Microsoft Exchange server 2013 and newer are vulnerable to NTLM relay attacks".
2019.02.05 - Microsoft published "ADV190007 | Guidance for "PrivExchange" Elevation of Privilege Vulnerability"
2019.02.12 - Microsoft published articles "CVE-2019-0686 | Microsoft Exchange Server Elevation of Privilege Vulnerability" and "CVE-2019-0724 | Microsoft Exchange Server Elevation of Privilege Vulnerability"
2019.02.12 - Microsoft published "February 2019 Quarterly Exchange Updates" with patches for all related vulnerabilities.

Android 9 does not show notifications from WhatsApp and Viber

After updating my Nokia 5.1 Plus from Android 8.1 to Android 9, I noticed that after a while I am not receiving notifications from any messengers like WhatsApp or Viber. This should not happen!

Method №1 (Official)

To fix this you need to perform 4 steps:

1) Turn "Adaptive Battery" on.
Settings → Battery → Adaptive Battery → On

2) Specify applications that do not need to be optimized.
Open "Settings → App & notifications → Advanced → Special app access → Battery optimization → All apps" and then open needed apps (e.g. WhatsApp or Viber) and choose "Don't optimize".

3) Check app's notifictions settings.
Open "Settings → App & notifications → <Needed application> → Notifications" and make sure that all necessary options are turned on.

4) Reboot the phone.