Exchange 2019
Solve Exchange 2019 SMTP error by quickly updating your DNS.
In one of my lab servers, I was busy working on a project and email would just not send. I kept on getting the error below from the consoles output: Error with SMTP server... (451, b'4.7.0 Temporary server error. Please try again later. PRX2') This error is generic...
Secure Exchange 2019 OWA with a Google Captcha option.
In one of my recent blog posts, we covered brute forcing of the OWA page in Exchange 2019, this also applies to Exchange 2016 and Exchange 2013. If an attacker successfully gains access, they might access an account that has elevated privileges or given enough time,...
Exchange 2019:- Get the Version with Product Name in PowerShell
If you are an Exchange Admin, you may have inherited Exchange Servers and are not sure what version you are running or you are simply managing Exchange but need to check Control Panel for installed updates to see what version you are on. If you have a few hundred or...
Exchange 2019:- Finding hidden credentials after obtaining a shell
Many admins save credentials in text, log, and other format files on servers, this can be a once off thing where they are troubleshooting something or they saved it there, thinking it is in a safe place and because nobody has access to servers generally, only...
Exchange 2019:- Running BurpSuite against your server to identify potential issues
BurpSuite has a scanner builtin that allows you to scan a URL or URLs and this will give you an output of what is vulnerabilities or misconfigurations are set. A simple thing may be the SSL certificate on your Exchange server, while you may think this is not...
Exchange 2019:- ProxyToken Exploit
In three of my previous blog posts, we looked at exploiting unpatched/vulnerable Exchange servers with "ProxyLogon", "ProxyShell" and "ProxyNotShell". As the exploit lists keep growing, we will look at the "ProxyToken" exploit. One of my many Exchange 2019 lab servers...
Windows Server 2022:- Bypassing Windows Defender with Nim
This article is about a YouTube video by "Tyler Ramsbey" that I used in my own environment to get a Reverse Shell from a Windows 2022 Server that is fully patched and Windows Defender did not detect me. All credit goes to "Tyler" and to "Sn1r" that created the Nim...
Exchange 2019:- Install the November 2023 Security Update (KB5032146)
Microsoft released the November 2023 Security Update (SU) for Exchange Server 2019. To read about this update and more, you can head over to the URL below:...
Exchange 2019:- ECP_DLP_Policy Exploit
I have been covering some of the exploits in Exchange Server in a few of my blog posts and wanted to highlight the fact that I tested another one which allowed me to get a shell on the Exchange Server. Metasploit has a module for the above exploit which worked against...
Exchange 2019:- ProxyNotShell Exploit
In two of my previous blog posts, we looked at exploiting unpatched/vulnerable Exchange servers with "ProxyLogon" and "ProxyShell". As the exploit lists keep growing, we will look at the "ProxyNotShell" exploit. One of my many Exchange 2019 lab servers was running...