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<p class="MsoNormal"><a name="_Hlk122600425">Good morning,<span style="mso-ligatures:none"><o:p></o:p></span></a></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:</span><span style="mso-bookmark:_Hlk122600425"><span style="font-family:"Arial",sans-serif;mso-ligatures:none">
</span><b>CVE-2023-7101: Spreadsheet::ParseExcel Remote Code Execution Vulnerability</b>. Due to its high visibility and knowledge of the software installed in the state environment, 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 2, 2024, CISA added CVE-2023-7101:Spreadsheet::ParseExcel Remote Code Execution Vulnerability to the known exploited vulnerabilities catalog. Currently CVE-2023-7101
has not been assigned a CVSS score.<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">Ubuntu vulnerability status by release:<o:p></o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l5 level1 lfo6"><span style="mso-bookmark:_Hlk122600425">Trusty – Ignored (End of standard support)<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l5 level1 lfo6"><span style="mso-bookmark:_Hlk122600425">Xenial – Needs triage<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l5 level1 lfo6"><span style="mso-bookmark:_Hlk122600425">Bionic – Needs triage<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l5 level1 lfo6"><span style="mso-bookmark:_Hlk122600425">Focal – Needs triage<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l5 level1 lfo6"><span style="mso-bookmark:_Hlk122600425">Jammy – Needs triage<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l5 level1 lfo6"><span style="mso-bookmark:_Hlk122600425">Lunar – Needs triage<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l5 level1 lfo6"><span style="mso-bookmark:_Hlk122600425">Mantic – Needs triage<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l5 level1 lfo6"><span style="mso-bookmark:_Hlk122600425">Upstream – Released (0.600-4)<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">Red Hat has not updated their bug status for CVE-2023-7101 since December, 25, 2023. The last status shows all Red Hat versions being vulnerable.<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">SUSE has an extensive list of products that are effective, please refer to this link for patching information:
</span><a href="https://www.suse.com/security/cve/CVE-2023-7101.html"><span style="mso-bookmark:_Hlk122600425">https://www.suse.com/security/cve/CVE-2023-7101.html</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">Debian vulnerability status by release for libspreadsheet-parsexcel-perl source package:<o:p></o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l4 level1 lfo7"><span style="mso-bookmark:_Hlk122600425">buster 0.6500-1 – Vulnerable<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l4 level1 lfo7"><span style="mso-bookmark:_Hlk122600425">buster (security) 0.6500-1+deb10u1 – Fixed<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l4 level1 lfo7"><span style="mso-bookmark:_Hlk122600425">bullseye 0.6500-1.1 – Vulnerable<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l4 level1 lfo7"><span style="mso-bookmark:_Hlk122600425">bullseye (security) 0.6500-1.1+deb11u1 – Fixed<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l4 level1 lfo7"><span style="mso-bookmark:_Hlk122600425">bookworm 0.6500-3 – Vulnerable<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l4 level1 lfo7"><span style="mso-bookmark:_Hlk122600425">bookworm (security) 0.6500-4~deb12u1 – Fixed<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l4 level1 lfo7"><span style="mso-bookmark:_Hlk122600425">sid, trixie 0.6600-1 - Fixed<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">Patching information is vendor specific, please refer to vendor documentation for patching. Please be aware that the above list is not comprehensive and does not include all vendors.<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"></span><a href="https://ubuntu.com/security/CVE-2023-7101"><span style="mso-bookmark:_Hlk122600425">https://ubuntu.com/security/CVE-2023-7101</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"></span><a href="https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2023-7101"><span style="mso-bookmark:_Hlk122600425">https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2023-7101</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"></span><a href="https://www.suse.com/security/cve/CVE-2023-7101.html"><span style="mso-bookmark:_Hlk122600425">https://www.suse.com/security/cve/CVE-2023-7101.html</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"></span><a href="https://security-tracker.debian.org/tracker/CVE-2023-7101"><span style="mso-bookmark:_Hlk122600425">https://security-tracker.debian.org/tracker/CVE-2023-7101</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"><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 3, 2024, the vulnerability has been confirmed as being exploited in the wild.<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>Workarounds:</u></b> Workarounds are vendor specific, please refer to vendor documentation for possible workarounds.<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>: Spreadsheet::ParseExcel contains a vulnerability that can allow for arbitrary code execution due to an unchecked incorporation of input from a file into a string-type
“eval”. The specific issue lies in the evaluation of Number format strings, distinct from printf-style format strings, within the Excel parsing logic.<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, a threat actor could execute arbitrary code.<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 January 3, 2024, Tenable has not released any plugins for the vulnerability and has no plugins in the pipeline.<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:l1 level1 lfo4"><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:l1 level1 lfo4"><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:l1 level1 lfo4"><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:l1 level1 lfo4"><span style="mso-bookmark:_Hlk122600425">Apply the Principle of Least Privilege to all systems and services.<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"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="line-height:105%"><span style="color:#1F497D"><img border="0" width="121" height="87" style="width:1.2583in;height:.9083in" id="Picture_x0020_4" src="cid:image001.png@01DA3E25.386D9A30"><span style="mso-ligatures:none"><o:p></o:p></span></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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