Vulnerability Details : CVE-2021-20839
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 to the other servers by processing a specially crafted XML document.
Vulnerability category: XML external entity (XXE) injectionDenial of service
Products affected by CVE-2021-20839
- cpe:2.3:a:antennahouse:office_server_document_converter:*:*:*:*:*:*:*:*
- cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr2:*:*:pro:*:*:*
- 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:mr3:*:*:*:*:*:*
- cpe:2.3:a:antennahouse:office_server_document_converter:6.1:mr4:*:*:*:*:*:*
- 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: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:*:*:*:*:*:*
- cpe:2.3:a:antennahouse:office_server_document_converter:7.0:*:*:*:*:*:*:*
- cpe:2.3:a:antennahouse:office_server_document_converter:7.2:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-20839
0.22%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 61 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20839
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:N/A:P |
8.6
|
2.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST |
CWE ids for CVE-2021-20839
-
The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-20839
-
https://www.antenna.co.jp/news/2021/osdc72-20211027.html
Patch;Vendor Advisory
-
https://jvn.jp/en/jp/JVN33453839/index.html
JVN#33453839: Multiple improper restriction of XML external entity reference (XXE) vulnerabilities in Office Server Document ConverterThird Party Advisory
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