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

critical Nessus Plugin ID 97991
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Synopsis

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

Description

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.

Solution

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

http://www.nessus.org/u?7cb68237

Plugin Details

Severity: Critical

ID: 97991

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

Version: 1.13

Type: combined

Family: CISCO

Published: 3/27/2017

Updated: 4/13/2021

Dependencies: cisco_ios_version.nasl

Risk Information

CVSS Score Source: CVE-2017-3881

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

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

CVSS v3

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: 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

Reference Information

CVE: CVE-2017-3881

BID: 96960

CISCO-BUG-ID: CSCvd48893

IAVA: 2017-A-0073

CISCO-SA: cisco-sa-20170317-cmp