Cisco IP Phones Web Server RCE and DOS (cisco-sa-voip-phones-rce-dos-rB6EeRXs)

critical Nessus Plugin ID 141192
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote IP phone has multiple vulnerabilities.


A denial of service (DoS) vulnerability and remote code execution (RCE) exists in Cisco IP Phones due to a lack of proper input validation of HTTP requests. An unauthenticated attacker can 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.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.


Apply the fix referenced in the vendor's advisory.

See Also

Plugin Details

Severity: Critical

ID: 141192

File Name: cisco-sa-voip-phones-rce-dos-rB6EeRXs.nasl

Version: 1.2

Type: local

Family: CISCO

Published: 10/6/2020

Updated: 10/7/2020

Dependencies: cisco_ip_phone_sip_detect.nbin

Risk Information

CVSS Score Source: CVE-2020-3161


Risk Factor: High

Score: 7.4


Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

Temporal Vector: E:POC/RL:OF/RC:C


Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

Temporal Vector: E:P/RL:O/RC:C

Vulnerability Information

CPE: x-cpe:/h:cisco:ip_phone, x-cpe:/o:cisco:ip_phone

Required KB Items: installed_sw/Cisco IP Phone

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/15/2020

Vulnerability Publication Date: 4/15/2020

Reference Information

CVE: CVE-2020-3161