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<p class="MsoNormal"><a name="_Hlk122600425">Good morning,</a><span style="mso-bookmark:_Hlk122600425"><span style="mso-ligatures:none"><o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425">The SOC Services team is reporting on two specific vulnerabilities recently disclosed from Progress Software:
<b><i>CVE-2023-40044 WS_FTP Server Ad Hoc Transfer Module .NET Deserialization Vulnerability
</i></b>and<b><i> CVE-2023-42657 WS_FTP Server Directory Traversal</i></b>. Due to its high visibility, knowledge of the software installed in the state environment, and out of an abundance of caution we are providing this in-depth information:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><b><u>History</u></b>: On September 28, 2023, Progress Software released updates to patch WS_FTP Server (also known as Ipswitch WS_FTP Server), addressing eight security flaws in total. Out of the
eight flaws, two in particular are rated as critical. CVE-2023-40044 was established on September 27, 2023, and is a .NET deserialization vulnerability currently assigned a CVSSv3 rating of 10.0 (Critical). CVE-2023-42657 was established on September 27,
2023, and is a directory traversal vulnerability currently assigned a CVSSv3 rating of 9.9 (Critical). Three other CVEs addressed in the security release are assigned with CVSSv3 ratings of High, and three more CVEs addressed are assigned CVSSv3 ratings of
Medium.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425">The following products are affected:<o:p></o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3"><span style="mso-bookmark:_Hlk122600425">Progress WS_FTP Server 2022 from version 8.8.0 to versions prior to 8.8.2<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3"><span style="mso-bookmark:_Hlk122600425">Progress WS_FTP Server 2020 from version 8.7.0 to versions prior to 8.7.4<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425">Patches are available from Progress to fix the vulnerabilities. The fixed versions are:<o:p></o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3"><span style="mso-bookmark:_Hlk122600425">Progress WS_FTP Server 2022 8.8.2<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3"><span style="mso-bookmark:_Hlk122600425">Progress WS_FTP Server 2020 8.7.4<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425">Further information is available from SOURCE as published in ARTICLE:<o:p></o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l2 level1 lfo3"><span style="mso-bookmark:_Hlk122600425">Progress Software bulletin –
</span><a href="https://community.progress.com/s/article/WS-FTP-Server-Critical-Vulnerability-September-2023"><span style="mso-bookmark:_Hlk122600425">https://community.progress.com/s/article/WS-FTP-Server-Critical-Vulnerability-September-2023</span><span style="mso-bookmark:_Hlk122600425"></span></a><span style="mso-bookmark:_Hlk122600425"><o:p></o:p></span></li></ul>
<p class="MsoListParagraph"><span style="mso-bookmark:_Hlk122600425"><span style="background:yellow;mso-highlight:yellow"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><b><u>Intelligence</u></b>: As of September 28, 2023, no known exploits have been utilized against the vulnerabilities. However, given the attention by threat actors to previous vulnerabilities
in Progress software, it is very likely that the vulnerabilities will be targeted and exploited in the near future.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><b><u>Workarounds:</u></b> The only workaround is applicable to CVE-2023-40044, in which the WS_FTP Server Ad Hoc Transfer Module must be removed or disabled in lieu of installing the provided update.
To remove or disable the module, documentation has been provided by Progress at </span>
<a href="https://community.progress.com/s/article/Removing-or-Disabling-the-WS-FTP-Server-Ad-hoc-Transfer-Module"><span style="mso-bookmark:_Hlk122600425">https://community.progress.com/s/article/Removing-or-Disabling-the-WS-FTP-Server-Ad-hoc-Transfer-Module</span><span style="mso-bookmark:_Hlk122600425"></span></a><span style="mso-bookmark:_Hlk122600425"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425">No other workarounds have been provided for the other seven CVEs identified.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><b><u><span style="background:yellow;mso-highlight:yellow"><o:p><span style="text-decoration:none"> </span></o:p></span></u></b></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><b><u>How it works</u></b>: There is no public information about how the vulnerabilities are exploited at this time.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><span style="background:yellow;mso-highlight:yellow"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><b><u>Post-Exploit</u></b>:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425">CVE-2023-40044 could allow a pre-authenticated attacker to leverage a .NET deserialization vulnerability in the Ad Hoc Transfer module to execute remote commands on the underlying WS_FTP Server operating
system. By exploiting the vulnerability, an attacker may modify deserialized data to possibly perform unauthorized actions.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425">CVE-2023-42657 could allow an attacker to escape the context of the WS_FTP Server file structure and perform the same level of operations on file or folder locations on the underlying operating system.
As a result an attacker could then view or modify critical files on the system.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425">Progress has noted that both CVEs can be exploited in low-complexity attacks that do not require user interaction.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425">No known indicators of compromise have been publicly shared at this time.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><span style="background:yellow;mso-highlight:yellow"><o:p> </o:p></span></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="mso-bookmark:_Hlk122600425">As of September 28, 2023, there are no plugins released by Tenable for detecting the vulnerabilities.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><b><u>Recommended Actions</u></b>:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"> <o:p></o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l4 level1 lfo8"><span style="mso-bookmark:_Hlk122600425">Enable logging.<o:p></o:p></span></li><li class="MsoNormal" style="mso-list:l4 level1 lfo8"><span style="mso-bookmark:_Hlk122600425">Remove or deny access to unnecessary and potentially vulnerable software to prevent abuse by adversaries.<o:p></o:p></span></li><li class="xmsonormal" style="mso-list:l4 level1 lfo8"><span style="mso-bookmark:_Hlk122600425">Maintain good cyber hygiene and follow vendor patching recommendations.<o:p></o:p></span></li><li class="MsoNormal" style="mso-list:l4 level1 lfo8"><span style="mso-bookmark:_Hlk122600425">Verify host has not been compromised before applying patches.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l4 level1 lfo8"><span style="mso-bookmark:_Hlk122600425">Apply appropriate updates provided by vendor to vulnerable systems immediately after appropriate testing.<o:p></o:p></span></li><li class="MsoNormal" style="mso-list:l4 level1 lfo8"><span style="mso-bookmark:_Hlk122600425">Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.<o:p></o:p></span></li><li class="MsoNormal" style="mso-list:l4 level1 lfo8"><span style="mso-bookmark:_Hlk122600425">Apply the Principle of Least Privilege to all systems and services.</span><o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="line-height:105%"><span style="color:#1F497D;mso-ligatures:none"><img border="0" width="121" height="87" style="width:1.2638in;height:.9097in" id="Picture_x0020_4" src="cid:image001.png@01D9F1DD.F2FA0BC0"><o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:105%"><b><span style="mso-ligatures:none">Cyber Security Services<o:p></o:p></span></b></p>
<p class="MsoNormal" style="line-height:105%"><span style="mso-ligatures:none">State of Oregon Cyber Security Services<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:105%"><span style="mso-ligatures:none">Enterprise Information Services | SOC<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:105%"><span style="mso-ligatures:none">Cyber Security Services (CSS)<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:105%"><span style="mso-ligatures:none">SOC Hotline: (503) 378-5930 | SOC Services (503) 373-0378<span style="color:#1F497D"><o:p></o:p></span></span></p>
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<p class="MsoNormal" style="line-height:105%"><i><span style="color:#2E74B5;mso-ligatures:none">“Ensuring user-friendly, reliable and secure state technology systems that serve Oregonians.”<o:p></o:p></span></i></p>
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