Vulnerability identifier: #VU63421

Vulnerability risk: Low

CVSSv3.1: 4.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-20807

CWE-ID: CWE-611

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Expressway
Server applications / Conferencing, Collaboration and VoIP solutions
Cisco TelePresence Video Communication Server
Server applications / Other server solutions

Vendor: Cisco Systems, Inc

Description

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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco Expressway: 14.0

Cisco TelePresence Video Communication Server: 14.0

---

External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-filewrite-bsFVwueV

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.