Vulnerability identifier: #VU64962

Vulnerability risk: Low

CVSSv3.1: 7.8 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-20812

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Expressway Series
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 perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in the cluster database API. A remote administrator can send a specially crafted HTTP request and overwrite arbitrary files on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Expressway Series: 14.0

Cisco TelePresence Video Communication Server: 14.0

---

External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-overwrite-3buqW8LH

---

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.