CVE-2021-20839 XML external entity in Office Server Document Converter
Remote unauthenticated attackers can cause denial of service via XML External Entity attacks in Office Server Document Converter.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-20839?
CVE-2021-20839 is a medium-severity vulnerability in Antenna House, Inc. Office Server Document Converter, published on 1 Nov 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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 to the other servers by processing a specially crafted XML document.
Weakness: CWE-611
Which versions are affected by CVE-2021-20839?
It affects 1 product.
Products include Antennahouse Office Server Document Converter.
How do I fix CVE-2021-20839?
No fix has been published for CVE-2021-20839 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-20839 being exploited?
There is no known exploitation of CVE-2021-20839 in the wild and no public exploit code.
Other vulnerabilities in Antenna House, Inc. Office Server Document Converter
Sources
Also known as GHSA-gcx3-8mj9-xgm6.