<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof ContentPasted0">
Hello,
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0">I hope everyone is doing well!</div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0">Below is the entry for today.</div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0">09/30/2022 - Diary entry #606:</div>
<div><br class="ContentPasted0">
</div>
<blockquote style="margin-top:0;margin-bottom:0">
<div class="ContentPasted0 ContentPasted1">This week, Microsoft confirmed two new zero-day vulnerabilities in the Microsoft Exchange server being exploited in the wild. The vulnerabilities affect on-premises versions of Microsoft Exchange Server 2013, 2016,
and 2019.
<div><br class="ContentPasted1">
</div>
<div class="ContentPasted1">The first vulnerability, tracked under CVE-2022-41040, is an authenticated Server-Side Request Forgery (SSRF) vulnerability. Without many technical details published, the exploitation of this vulnerability allows privilege escalation.</div>
<div><br class="ContentPasted1">
</div>
<div class="ContentPasted1">The second, tracked under CVE-2022-41082, is an authenticated RCE vulnerability, allowing authenticated users to execute code in the compromised server by making a request with a special crafted string to enable remote PowerShell.</div>
<div><br class="ContentPasted1">
</div>
<div class="ContentPasted1">Until a security update that addresses this vulnerability is available, it's recommended that system administrators add the string “.autodiscover.json.@.Powershell.“ to Request Blocking on the Exchange front-end and blocking the
ports 5985 and 5986, used for remote PowerShell.</div>
<div><br class="ContentPasted1">
</div>
When compared to the Proxy-Shell vulnerability, this one has the downside of needing an authenticated user to be able to exploit it - making it less probable to be exploited. Nevertheless, we highly recommend any organization using on-premises exchange servers
to apply the remediation patches, and keep the appliance always up-to-date and in a segmented network, minimizing the impact of any incident in that server.<br>
</div>
</blockquote>
<div><br class="ContentPasted0">
</div>
Kind Regards,<br>
</div>
<div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div id="Signature">
<div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<table style="font-size:medium; font-family:"Times New Roman"" id="tableSelected0">
<tbody>
<tr>
<td style="width:180px" align="left">
<table width="120" align="left">
<tbody>
<tr>
<td colspan="3" align="center"><a href="https://www.appgate.com/" target="_blank" rel="noopener noreferrer" style="margin:0px"><img style="margin:0px" width="120" height="30" src="https://d3aafpijpsak2t.cloudfront.net/images/Signature/logo@2x.png"></a></td>
</tr>
<tr>
<td colspan="3" align="center"> </td>
</tr>
<tr>
<td width="37%" align="center"><a href="https://www.linkedin.com/company/appgate-security/" target="_blank" rel="noopener noreferrer" style="margin:0px"><img style="margin:0px" width="18" height="18" src="https://d3aafpijpsak2t.cloudfront.net/images/Signature/likedin@2x.png"></a></td>
<td width="28%"><a href="https://twitter.com/AppgateSecurity" target="_blank" rel="noopener noreferrer" style="margin:0px"><img style="margin:0px" width="20" height="18" src="https://d3aafpijpsak2t.cloudfront.net/images/Signature/twitter@2x.png"></a></td>
<td width="35%"><a href="https://www.youtube.com/channel/UC-8GvxcZbm-R3EJNl8jYjiQ" target="_blank" rel="noopener noreferrer" style="margin:0px"><img style="width: 26px; height: 18px; max-width: initial;" width="26" height="18" src="https://d3aafpijpsak2t.cloudfront.net/images/Signature/youtube@2x.png"></a></td>
</tr>
</tbody>
</table>
<p style="margin-top:0px; margin-bottom:0px"> </p>
</td>
<td colspan="2" rowspan="2" style="width:350px">
<p style="color:rgb(12,12,12); font-size:13px; font-family:Arial,Helvetica,sans-serif; margin-top:0px; margin-bottom:0px">
<strong>MART</strong><br>
</p>
<p style="color:rgb(12,12,12); font-size:13px; font-family:Arial,Helvetica,sans-serif; margin-top:0px; margin-bottom:0px">
Malware Analysis and Research Team<br>
<strong>Appgate</strong></p>
<p style="color:rgb(12,12,12); font-size:13px; font-family:Arial,Helvetica,sans-serif; margin-top:0px; margin-bottom:0px">
E:<span style="margin:0px"> <a href="mailto:felipe.tarijon@appgate.com" title="mailto:felipe.tarijon@appgate.com">
</a><a href="mailto:ctas-mat@appgate.com" title="mailto:ctas-mat@appgate.com">ctas-mat@appgate.com</a></span><br>
</p>
<p style="color:rgb(12,12,12); font-size:13px; font-family:Arial,Helvetica,sans-serif; margin-top:0px; margin-bottom:0px">
<span style="margin:0px; background-color:white"><br>
</span></p>
</td>
</tr>
</tbody>
</table>
<br>
</div>
</div>
</div>
</div>
</body>
</html>