Cisco IOS XE Software Consent Token Bypass Vulnerability (cisco-sa-20190925-iosxe-ctbypass)

high Nessus Plugin ID 129586

Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco IOS XE Software is affected by a vulnerability it the CLI. The source of the vulnerability is insufficient enforcement of the consent token in authorizing shell access. By authenticating to the CLI and requesting shell access, an attacker could use this vulnerability to run commands on the underlying OS.

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

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvp34481

See Also

http://www.nessus.org/u?10434195

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvp34481

Plugin Details

Severity: High

ID: 129586

File Name: cisco-sa-20190925-iosxe-ctbypass.nasl

Version: 1.10

Type: combined

Family: CISCO

Published: 10/4/2019

Updated: 5/3/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2019-12671

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios_xe

Required KB Items: Host/Cisco/IOS-XE/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 9/25/2019

Vulnerability Publication Date: 9/25/2019

Reference Information

CVE: CVE-2019-12671

CWE: 285

CISCO-SA: cisco-sa-20190925-iosxe-ctbypass

IAVA: 2019-A-0352-S

CISCO-BUG-ID: CSCvp34481