CVE-2021-40444
Microsoft MSHTML Remote Code Execution Vulnerabili - [Actively Exploited]
Description
<p>Microsoft is investigating reports of a remote code execution vulnerability in MSHTML that affects Microsoft Windows. Microsoft is aware of targeted attacks that attempt to exploit this vulnerability by using specially-crafted Microsoft Office documents.</p> <p>An attacker could craft a malicious ActiveX control to be used by a Microsoft Office document that hosts the browser rendering engine. The attacker would then have to convince the user to open the malicious document. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.</p> <p>Microsoft Defender Antivirus and Microsoft Defender for Endpoint both provide detection and protections for the known vulnerability. Customers should keep antimalware products up to date. Customers who utilize automatic updates do not need to take additional action. Enterprise customers who manage updates should select the detection build 1.349.22.0 or newer and deploy it across their environments. Microsoft Defender for Endpoint alerts will be displayed as: “Suspicious Cpl File Execution”.</p> <p>Upon completion of this investigation, Microsoft will take the appropriate action to help protect our customers. This may include providing a security update through our monthly release process or providing an out-of-cycle security update, depending on customer needs.</p> <p>Please see the <strong>Mitigations</strong> and <strong>Workaround</strong> sections for important information about steps you can take to protect your system from this vulnerability.</p> <p><strong>UPDATE</strong> September 14, 2021: Microsoft has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. Please see the FAQ for important information about which updates are applicable to your system.</p>
INFO
Published Date :
Sept. 15, 2021, 12:15 p.m.
Last Modified :
July 29, 2024, 7:38 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.3
Exploitability Score :
2.8
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
Microsoft MSHTML contains a unspecified vulnerability that allows for remote code execution.
Apply updates per vendor instructions.
Public PoC/Exploit Available at Github
CVE-2021-40444 has a 122 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2021-40444
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-40444.
| URL | Resource |
|---|---|
| http://packetstormsecurity.com/files/164210/Microsoft-Windows-MSHTML-Overview.html | Third Party Advisory VDB Entry |
| http://packetstormsecurity.com/files/165214/Microsoft-Office-Word-MSHTML-Remote-Code-Execution.html | Exploit Third Party Advisory VDB Entry |
| http://packetstormsecurity.com/files/167317/Microsoft-Office-MSDT-Follina-Proof-Of-Concept.html | Exploit Third Party Advisory VDB Entry |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40444 | Mitigation Patch Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Batchfile VBA Python HTML
Blogs/Talks
None
Batchfile VBA Python HTML
This repository contains scripts and resources for exploiting the Follina CVE and CVE-2021-40444 vulnerabilities in Microsoft Office. The scripts generate malicious document files that can execute arbitrary code on the target system.
Python Batchfile HTML JavaScript PowerShell VBScript
For learning purpose did a complete analysis on CVE-2021-40444 POC (proof of concept)
Rust HTML
None
None
None
Batchfile VBA Python HTML
None
Batchfile VBA Python HTML
This is a simulation of attack by Fancy Bear group (APT28) targeting high-ranking government officials Western Asia and Eastern Europe
Python C++ C#
All CVE - PoC in GitHub
poc proofofconcept tester allcve cvegithub cvenew cvepoc cveupdate
None
A curated list of my GitHub stars!
None
Java
渗透测试有关的POC、EXP、脚本、提权、小工具等---About penetration-testing python-script poc getshell csrf xss cms php-getshell domainmod-xss csrf-webshell cobub-razor cve rce sql sql-poc poc-exp bypass oa-getshell cve-cms
Assembly Python Shell PHP C++ C Go Ruby HTML Java
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-40444 vulnerability anywhere in the article.
-
Kaspersky
Exploits and vulnerabilities in Q2 2024
Q2 2024 was eventful in terms of new interesting vulnerabilities and exploitation techniques for applications and operating systems. Attacks through vulnerable drivers have become prevalent as a gener ... Read more
-
Trend Micro
CVE-2024-38112: Void Banshee Targets Windows Users Through Zombie Internet Explorer in Zero-Day Attacks
Exploits & Vulnerabilities Our threat hunters discovered CVE-2024-38112, which was used as a zero-day by APT group Void Banshee, to access and execute files through the disabled Internet Explorer usin ... Read more
The following table lists the changes that have been made to the
CVE-2021-40444 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Modified Analysis by [email protected]
Jul. 29, 2024
Action Type Old Value New Value Changed Reference Type http://packetstormsecurity.com/files/164210/Microsoft-Windows-MSHTML-Overview.html Exploit, Third Party Advisory, VDB Entry http://packetstormsecurity.com/files/164210/Microsoft-Windows-MSHTML-Overview.html Third Party Advisory, VDB Entry Changed CPE Configuration OR *cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:-:*:-:* *cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:-:*:-:* *cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2012:-:r2:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:* OR *cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.10240.19060 *cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.14393.4651 *cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.17763.2183 *cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.18363.1801 *cpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.19041.1237 *cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.19042.1237 *cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.19043.1237 *cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.19041.1237 *cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2012:-:r2:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.14393.4651 *cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.17763.2183 *cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.20348.230 *cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.19042.1237 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Dec. 28, 2023
Action Type Old Value New Value Changed Description Microsoft MSHTML Remote Code Execution Vulnerability <p>Microsoft is investigating reports of a remote code execution vulnerability in MSHTML that affects Microsoft Windows. Microsoft is aware of targeted attacks that attempt to exploit this vulnerability by using specially-crafted Microsoft Office documents.</p> <p>An attacker could craft a malicious ActiveX control to be used by a Microsoft Office document that hosts the browser rendering engine. The attacker would then have to convince the user to open the malicious document. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.</p> <p>Microsoft Defender Antivirus and Microsoft Defender for Endpoint both provide detection and protections for the known vulnerability. Customers should keep antimalware products up to date. Customers who utilize automatic updates do not need to take additional action. Enterprise customers who manage updates should select the detection build 1.349.22.0 or newer and deploy it across their environments. Microsoft Defender for Endpoint alerts will be displayed as: “Suspicious Cpl File Execution”.</p> <p>Upon completion of this investigation, Microsoft will take the appropriate action to help protect our customers. This may include providing a security update through our monthly release process or providing an out-of-cycle security update, depending on customer needs.</p> <p>Please see the <strong>Mitigations</strong> and <strong>Workaround</strong> sections for important information about steps you can take to protect your system from this vulnerability.</p> <p><strong>UPDATE</strong> September 14, 2021: Microsoft has released security updates to address this vulnerability. Please see the Security Updates table for the applicable update for your system. We recommend that you install these updates immediately. Please see the FAQ for important information about which updates are applicable to your system.</p> Added CVSS V3.1 Microsoft Corporation AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L -
Modified Analysis by [email protected]
Oct. 14, 2022
Action Type Old Value New Value Changed Reference Type http://packetstormsecurity.com/files/167317/Microsoft-Office-MSDT-Follina-Proof-Of-Concept.html No Types Assigned http://packetstormsecurity.com/files/167317/Microsoft-Office-MSDT-Follina-Proof-Of-Concept.html Exploit, Third Party Advisory, VDB Entry -
CWE Remap by [email protected]
Jul. 12, 2022
Action Type Old Value New Value Changed CWE NVD-CWE-noinfo CWE-22 -
CVE Modified by [email protected]
Jun. 02, 2022
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/167317/Microsoft-Office-MSDT-Follina-Proof-Of-Concept.html [No Types Assigned] -
Modified Analysis by [email protected]
Dec. 15, 2021
Action Type Old Value New Value Changed Reference Type http://packetstormsecurity.com/files/164210/Microsoft-Windows-MSHTML-Overview.html Exploit, Third Party Advisory http://packetstormsecurity.com/files/164210/Microsoft-Windows-MSHTML-Overview.html Exploit, Third Party Advisory, VDB Entry Changed Reference Type http://packetstormsecurity.com/files/165214/Microsoft-Office-Word-MSHTML-Remote-Code-Execution.html No Types Assigned http://packetstormsecurity.com/files/165214/Microsoft-Office-Word-MSHTML-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry -
CVE Modified by [email protected]
Dec. 09, 2021
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/165214/Microsoft-Office-Word-MSHTML-Remote-Code-Execution.html [No Types Assigned] -
Initial Analysis by [email protected]
Sep. 24, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Changed Reference Type http://packetstormsecurity.com/files/164210/Microsoft-Windows-MSHTML-Overview.html No Types Assigned http://packetstormsecurity.com/files/164210/Microsoft-Windows-MSHTML-Overview.html Exploit, Third Party Advisory Changed Reference Type https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40444 No Types Assigned https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40444 Mitigation, Patch, Vendor Advisory Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:-:*:-:* *cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:-:*:-:* *cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2012:-:r2:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Sep. 20, 2021
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/164210/Microsoft-Windows-MSHTML-Overview.html [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-40444 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-40444
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
97.09 }} -0.02%
score
0.99824
percentile