#VU79953 OS Command Injection in Expressway Series and TelePresence Video Communication Server (VCS) - CVE-2023-20209

Vulnerability identifier: #VU79953

Vulnerability risk: Low

CVSSv4.0: 7.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2023-20209

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Expressway Series
Server applications / Conferencing, Collaboration and VoIP solutions
TelePresence Video Communication Server (VCS)
Other software / Other software solutions

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote user to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation in the web-based management interface. A remote administrator can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Expressway Series: 14.0

TelePresence Video Communication Server (VCS): 14.0

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External links
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-injection-X475EbTQ

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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. However, proof of concept for this vulnerability is available.