Cisco IP Phones Web Server RCE and DOS (cisco-sa-20200205-voip-phones-rce-dos)

High Nessus Plugin ID 142018

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VPR Score: 6.7


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 missing checks when processing Cisco Discovery Protocol messages. An unauthenticated attacker can exploit this vulnerability by sending a crafted Cisco Discovery Protocol packet to the targeted IP phone. 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 denial of service (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: High

ID: 142018

File Name: cisco-sa-20200205-voip-phones-rce-dos.nasl

Version: 1.2

Type: local

Family: CISCO

Published: 2020/10/28

Updated: 2020/10/29

Dependencies: 138761

Risk Information

Risk Factor: High

VPR Score: 6.7

CVSS Score Source: CVE-2020-3111

CVSS v2.0

Base Score: 8.3

Temporal Score: 6.1

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 8.8

Temporal Score: 7.7

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

Temporal Vector: CVSS:3.0/E:U/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 Ease: No known exploits are available

Patch Publication Date: 2020/02/05

Vulnerability Publication Date: 2020/02/05

Reference Information

CVE: CVE-2020-3111