7.5
HIGH
CVE-2021-20838
Microsoft Office Server Document Converter XXE DoS Vuln
Description
Office Server Document Converter V7.2MR4 and earlier and V7.1MR7 and earlier allows a remote unauthenticated attacker to conduct an XML External Entity (XXE) attack to cause a denial of service (DoS) condition by processing a specially crafted XML document.
INFO
Published Date :
Nov. 1, 2021, 2:15 a.m.
Last Modified :
Nov. 8, 2021, 7:04 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
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-2021-20838.
| URL | Resource |
|---|---|
| https://jvn.jp/en/jp/JVN33453839/index.html | Third Party Advisory |
| https://www.antenna.co.jp/news/2021/osdc72-20211027.html | 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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-20838 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-20838 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.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Reanalysis by [email protected]
Nov. 08, 2021
Action Type Old Value New Value Removed CPE Configuration OR *cpe:2.3:a:antennahouse:office_server_document_converter:*:*:*:*:*:*:*:* versions up to (excluding) 5.2 *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:-:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr1:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr10:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr11:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr12:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr3:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr4:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr5:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr6:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr7:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr8:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr9:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:-:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr1:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr10:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr3:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr4:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr5:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr6:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr7:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr8:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr9:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:-:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr1:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr3:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr4:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr5:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr6:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr7:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr8:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:-:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr1:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr3:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr4:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr5:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr6:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:-:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr1:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr3:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr4:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr5:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr6:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr7:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.2:-:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr1:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr3:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr4:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:antennahouse:office_server_document_converter:*:*:*:*:*:*:*:* versions up to (excluding) 5.2 *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:-:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:-:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr1:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:-:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr2:*:*:pro:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr3:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr4:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:*:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr1:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr3:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:-:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr1:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr3:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.2:*:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr1:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr3:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr4:*:*:*:*:*:* -
Initial Analysis by [email protected]
Nov. 02, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://jvn.jp/en/jp/JVN33453839/index.html No Types Assigned https://jvn.jp/en/jp/JVN33453839/index.html Third Party Advisory Changed Reference Type https://www.antenna.co.jp/news/2021/osdc72-20211027.html No Types Assigned https://www.antenna.co.jp/news/2021/osdc72-20211027.html Patch, Vendor Advisory Added CWE NIST CWE-611 Added CPE Configuration OR *cpe:2.3:a:antennahouse:office_server_document_converter:*:*:*:*:*:*:*:* versions up to (excluding) 5.2 *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:-:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr1:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr10:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr11:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr12:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr3:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr4:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr5:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr6:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr7:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr8:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:5.2:mr9:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:-:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr1:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr10:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr3:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr4:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr5:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr6:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr7:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr8:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.0:mr9:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:-:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr1:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr3:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr4:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr5:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr6:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr7:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr8:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:-:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr1:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr3:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr4:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr5:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.0:mr6:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:-:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr1:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr3:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr4:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr5:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr6:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.1:mr7:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.2:-:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr1:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr2:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr3:*:*:*:*:*:* *cpe:2.3:a:antennahouse:office_server_document_converter:7.2:mr4:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-20838 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-2021-20838
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.28 }} 0.04%
score
0.68613
percentile
CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability