Cisco IP Phones Web Server Remote Code Execution and Denial of Service (CVE-2020-3161)

critical Tenable OT Security Plugin ID 502115

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability in the web server for Cisco IP Phones could allow an unauthenticated, remote attacker to execute code with root privileges or cause a reload of an affected IP phone, resulting in a denial of service (DoS) condition. The vulnerability is due to a lack of proper input validation of HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web server of a targeted device. A successful exploit could allow the attacker to remotely execute code with root privileges or cause a reload of an affected IP phone, resulting in a DoS condition.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

Plugin Details

Severity: Critical

ID: 502115

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 3/18/2024

Updated: 3/18/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2020-3161

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ip_phone_7811_firmware:11.7%281%29, cpe:/o:cisco:ip_phone_8845_firmware:11.7%281%29, cpe:/o:cisco:ip_phone_8851_firmware:11.7%281%29, cpe:/o:cisco:ip_phone_7841_firmware:11.7%281%29, cpe:/o:cisco:ip_phone_8841_firmware:11.7%281%29, cpe:/o:cisco:ip_phone_8865_firmware:11.7%281%29, cpe:/o:cisco:ip_phone_8861_firmware:11.7%281%29, cpe:/o:cisco:ip_phone_7861_firmware:11.7%281%29, cpe:/o:cisco:ip_phone_8811_firmware:11.7%281%29, cpe:/o:cisco:ip_phone_7821_firmware:11.7%281%29, cpe:/o:cisco:ip_phone_8831_firmware:10.3%281%29sr6, cpe:/o:cisco:ip_phone_8821_firmware:11.0%285%29sr3, cpe:/o:cisco:ip_phone_8821-ex_firmware:11.0%285%29sr3

Required KB Items: Tenable.ot/Cisco

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/15/2020

Vulnerability Publication Date: 4/15/2020

CISA Known Exploited Vulnerability Due Dates: 5/3/2022

Reference Information

CVE: CVE-2020-3161

CWE: 20

Detections

Analytics