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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 the vulnerability:
<b><i>CVE-2023-22527 Atlassian Confluence Data Center and Server Template Injection Vulnerability</i></b>. Due to its high visibility, knowledge of the software installed in the state environment, and active exploitations, 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 January 16, 2024, Atlassian released a security advisory in regards to their Confluence Data Center and Confluence Server products. CVE-2023-22527 is a Remote Code Execution
vulnerability and is currently assigned a CVSSv3 rating of 9.8 (Critical) by NIST, while Atlassian themselves rate the CVE as a 10.0 (Critical). The CVE was established on January 16, 2024. On January 24, 2024 CISA added the vulnerability to their list of
Known Exploited Vulnerabilities.<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:l3 level1 lfo3"><span style="mso-bookmark:_Hlk122600425">Atlassian Confluence Data Center 8.0.x, 8.1.x, 8.2.x, 8.3.x, 8.4.x, and 8.5.0-8.5.3<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level1 lfo3"><span style="mso-bookmark:_Hlk122600425">Atlassian Confluence Server 8.0.x, 8.1.x, 8.2.x, 8.3.x, 8.4.x, and 8.5.0-8.5.3<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 Atlassian 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:l3 level1 lfo3"><span style="mso-bookmark:_Hlk122600425">Atlassian Confluence Data Center 8.5.4 or higher<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level1 lfo3"><span style="mso-bookmark:_Hlk122600425">Atlassian Confluence Server 8.5.4 or higher<o:p></o:p></span></li></ul>
<p class="MsoListParagraph"><span style="mso-bookmark:_Hlk122600425"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425">Further information is available from Atlassian as published in their Security Advisory and FAQ:<o:p></o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level1 lfo3"><span style="mso-bookmark:_Hlk122600425">CVE-2023-22527 RCE Vulnerability in Confluence Data Center and Server –
</span><a href="https://confluence.atlassian.com/security/cve-2023-22527-rce-remote-code-execution-vulnerability-in-confluence-data-center-and-confluence-server-1333990257.html"><span style="mso-bookmark:_Hlk122600425">https://confluence.atlassian.com/security/cve-2023-22527-rce-remote-code-execution-vulnerability-in-confluence-data-center-and-confluence-server-1333990257.html</span><span style="mso-bookmark:_Hlk122600425"></span></a><span style="mso-bookmark:_Hlk122600425"><o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l3 level1 lfo3"><span style="mso-bookmark:_Hlk122600425">FAQ for CVE-2023-22527 -
</span><a href="https://confluence.atlassian.com/kb/faq-for-cve-2023-22527-1332810917.html"><span style="mso-bookmark:_Hlk122600425">https://confluence.atlassian.com/kb/faq-for-cve-2023-22527-1332810917.html</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 January 24, 2024, CISA is aware that CVE-2023-22527 has been exploited in the wild. As of January 23, 2024 ShadowServer reported that there were over 11,000 instances
publicly exposed and that adversaries have been actively scanning for vulnerable instances. It is very likely that the exploit will continue to be leveraged by threat actors over the coming months.<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> There are no workarounds at this time.<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>: The vulnerability is based on an Object-Graph Navigation Language (OGNL) attack against improperly validated and sanitized user input. An unauthenticated attacker can
execute arbitrary commands remotely in a vulnerable Confluence instance’s templates.<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>: Upon successful exploitation of the vulnerability an unauthenticated attacker can execute arbitrary commands in the context of the application.<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">Atlassian has not provided specific IOCs at this time, citing that the possibility of multiple entry points along with chained attacks make it difficult to provide indicators.<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 DATE, the following vulnerability plugins have been released and are currently in Tenable Security Center:<o:p></o:p></span></p>
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<p class="MsoNormal" align="center" style="text-align:center"><span style="mso-bookmark:_Hlk122600425"><b><u>Plugin<o:p></o:p></u></b></span></p>
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<p class="MsoNormal" align="center" style="text-align:center"><span style="mso-bookmark:_Hlk122600425"><b><u>Title<o:p></o:p></u></b></span></p>
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<p class="MsoNormal" align="center" style="text-align:center"><span style="mso-bookmark:_Hlk122600425"><b><u>Severity<o:p></o:p></u></b></span></p>
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<p class="MsoNormal" align="center" style="text-align:center"><span style="mso-bookmark:_Hlk122600425"></span><a href="https://www.tenable.com/plugins/was/114150"><span style="mso-bookmark:_Hlk122600425">114150</span><span style="mso-bookmark:_Hlk122600425"></span></a><span style="mso-bookmark:_Hlk122600425"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><b>Atlassian Confluence 8.x < 8.5.4 Remote Code Execution<o:p></o:p></b></span></p>
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<p class="MsoNormal" align="center" style="text-align:center"><span style="mso-bookmark:_Hlk122600425">Critical<o:p></o:p></span></p>
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<p class="MsoNormal" align="center" style="text-align:center"><span style="mso-bookmark:_Hlk122600425"></span><a href="https://www.tenable.com/plugins/nessus/188068"><span style="mso-bookmark:_Hlk122600425">188068</span><span style="mso-bookmark:_Hlk122600425"></span></a><span style="mso-bookmark:_Hlk122600425"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><b>Atlassian Confluence < 8.5.4 RCE (CONFSERVER-93833)<o:p></o:p></b></span></p>
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<p class="MsoNormal" align="center" style="text-align:center"><span style="mso-bookmark:_Hlk122600425">Critical<o:p></o:p></span></p>
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<span style="mso-bookmark:_Hlk122600425"></span></td>
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<p class="MsoNormal"><span style="mso-bookmark:_Hlk122600425"><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>
<span style="mso-bookmark:_Hlk122600425"></span>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="mso-list:l5 level1 lfo8">Review logs for indicators of compromise.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l5 level1 lfo8">Verify host has not been compromised before applying patches.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l5 level1 lfo8">Apply appropriate updates provided by vendor to vulnerable systems immediately after appropriate testing.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l5 level1 lfo8">Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.<o:p></o:p></li><li class="MsoNormal" style="mso-list:l5 level1 lfo8">Apply the Principle of Least Privilege to all systems and services<o:p></o:p></li></ul>
<p class="MsoNormal"><o:p> </o:p></p>
<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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<p class="MsoNormal"><o:p> </o:p></p>
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