Cisco IOS Cluster Management Protocol Telnet Option Handling RCE (cisco-sa-20170317-cmp)

critical Nessus Plugin ID 97991


The remote device is missing a vendor-supplied security patch.


According to its self-reported version and configuration, the Cisco IOS software running on the remote device is affected by a remote code execution vulnerability in the Cluster Management Protocol (CMP) subsystem due to improper handling of CMP-specific Telnet options. An unauthenticated, remote attacker can exploit this by establishing a Telnet session with malformed CMP-specific telnet options, to execute arbitrary code.


Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvd48893. Alternatively, as a workaround, disable the Telnet protocol for incoming connections.

See Also

Plugin Details

Severity: Critical

ID: 97991

File Name: cisco-sa-20170317-cmp-ios.nasl

Version: 1.15

Type: combined

Family: CISCO

Published: 3/27/2017

Updated: 3/28/2022

Risk Information

CVSS Score Source: CVE-2017-3881


Risk Factor: Medium

Score: 6.7


Risk Factor: Critical

Base Score: 10

Temporal Score: 8.7

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

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


Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.4

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

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

Vulnerability Information

CPE: cpe:/o:cisco:ios

Required KB Items: Host/Cisco/IOS/Version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/17/2017

Vulnerability Publication Date: 3/17/2017

CISA Known Exploited Dates: 4/15/2022

Reference Information

CVE: CVE-2017-3881

BID: 96960


IAVA: 2017-A-0073

CISCO-SA: cisco-sa-20170317-cmp