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<div style="margin:0px;font-size:14.67px;background-color:white">I hope everyone is doing well!</div>
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<div style="margin:0px;font-size:14.67px;background-color:white">Below is the entry for today.</div>
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<div style="margin:0px;font-size:14.67px;background-color:white">06/30/2021 - Diary entry #295:<br>
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This week a PoC of a new Windows exploit was publicly posted on Github. Dubbed PrintNightmare, the exploit can be used across various versions of Windows (from Windows 7 to Windows 10) and Windows Server (from 2004 to 20H2). The published exploit allows an
attacker with a regular Domain User's account to achieve full SYSTEM privileges on the vulnerable machine.
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<div>Tracked under CVE-2021-1675, PrintNightmare us a vulnerability affect Print Spooler on Windows. Print Spooler manages the printing queue in Windows, handling the printer drivers and scheduling. This process can load third-party libraries and also runs
with the highest privilege on the machine (SYSTEM), making it a very dangerous process to have a vulnerability on.</div>
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With the public exploit already published, it's just a matter of time before malware starts to exploit this vulnerability, as it can be used for both RCE (in case a Domain user is compromised) and Privilege Escalation after an initial breach. CVE-2021-1675
was already fixed in June 8th Patch Tuesday. We highly recommend anyone using Windows to make sure the system is up to date.
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<span style="margin:0px;font-size:14.67px;background-color:white">Kind Regards,</span></div>
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<strong>Felipe Duarte Domingues</strong><br>
Security Researcher<br>
<strong>Appgate</strong></p>
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E:<span> </span><font color="#228ebe"><a href="mailto:felipe.duarte@appgate.com" title="mailto:felipe.duarte@appgate.com">felipe.duarte@appgate.com</a></font><br>
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