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

critical Nessus Plugin ID 141192
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VPR Score: 7.4


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

Risk Factor: Critical

VPR Score: 7.4

CVSS Score Source: CVE-2020-3161

CVSS v2.0

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

CVSS v3.0

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