XML External Entity injection in Cisco Expressway and Cisco TelePresence Video Communication Server - CVE-2022-20807
Published: May 19, 2022
Vulnerability identifier: #VU63421
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2022-20807
CWE-ID: CWE-611
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to gain access to sensitive information.
The vulnerability exists due to insufficient validation of user-supplied XML input in the file-parsing logic. A remote administrator can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.
Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.
Affected software
Cisco Expressway
Cisco TelePresence Video Communication Server
Cisco TelePresence Video Communication Server
How to mitigate CVE-2022-20807
Install updates from vendor's website.
Cisco Expressway - update to 14.0.7
Cisco TelePresence Video Communication Server - update to 14.0.7
Cisco TelePresence Video Communication Server - update to 14.0.7