CVE-2021-34716

Cisco Expressway Series and TelePresence Video Communication Server Remote Code Execution Vulnerability

Severity Score

7.2

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track*

*SSVC

Descriptions

A vulnerability in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker to execute arbitrary code on the underlying operating system as the root user. This vulnerability is due to incorrect handling of certain crafted software images that are uploaded to the affected device. An attacker could exploit this vulnerability by authenticating to the system as an administrative user and then uploading specific crafted software images to the affected device. A successful exploit could allow the attacker to execute arbitrary code on the underlying operating system as the root user.

Una vulnerabilidad en la interfaz de administración basada en la web de la serie Expressway de Cisco y Cisco TelePresence Video Communication Server (VCS), podría permitir a un atacante autenticado remoto ejecutar código arbitrario en el sistema operativo subyacente como usuario root. Esta vulnerabilidad es debido al manejo incorrecto de determinadas imágenes de software diseñadas que son cargados en el dispositivo afectado. Un atacante podría explotar esta vulnerabilidad al autenticarse en el sistema como un usuario administrativo y luego cargando imágenes de software específicamente diseñadas en el dispositivo afectado. Una explotación con éxito podría permitir al atacante ejecutar código arbitrario en el sistema operativo subyacente como usuario root.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Track*

Exploitation

None

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2021-06-15 CVE Reserved
2021-08-18 CVE Published
2023-11-10 EPSS Updated
2024-11-07 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-460: Improper Cleanup on Thrown Exception
CWE-755: Improper Handling of Exceptional Conditions

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewrce-QPynNCjh	2023-11-07

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"		Expressway Search vendor "Cisco" for product "Expressway"				>= x8.6.0 < x14.1 Search vendor "Cisco" for product "Expressway" and version " >= x8.6.0 < x14.1"		-		Affected
Cisco Search vendor "Cisco"		Telepresence Video Communication Server Search vendor "Cisco" for product "Telepresence Video Communication Server"				>= x8.6 <= x14.0.3 Search vendor "Cisco" for product "Telepresence Video Communication Server" and version " >= x8.6 <= x14.0.3"		-		Affected