XML External Entity injection in Office Server Document Converter - CVE-2021-20839

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Main Vulnerability Database Vulnerabilities #VU57779

XML External Entity injection in Office Server Document Converter - CVE-2021-20839

Published: October 29, 2021


Vulnerability identifier: #VU57779
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:L/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-20839
CWE-ID: CWE-611
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Office Server Document Converter
Software vendor:
Antenna House

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied XML input in the other servers. A remote attacker can pass a specially crafted XML code to the affected application and cause a denial of service condition on the other servers.


Remediation

Install updates from vendor's website.

External links