Multiple vulnerabilities in Cisco Expressway Series and Cisco TelePresence Video Communication Server

Published: 2022-03-02

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2022-20754 CVE-2022-20755
CWE-ID	CWE-22 CWE-78
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Cisco Expressway Server applications / Conferencing, Collaboration and VoIP solutions TelePresence Video Communication Server (VCS) Other software / Other software solutions
Vendor	Cisco Systems, Inc

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Path traversal

EUVDB-ID: #VU60966

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-20754

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote user to overwrite arbitrary files on the system.

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

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco Expressway: X14.0.3 - X14.0.4

TelePresence Video Communication Server (VCS): X14.0.3 - X14.0.4

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-filewrite-87Q5YRk
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa25107

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.

2) OS Command Injection

EUVDB-ID: #VU60967