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Cisco IOS XE Software Digital Signature Verification Bypass Vulnerability

medium Nessus Plugin ID 134562

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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 that could result in the loading of unsigned firmware on boot. An authenticated attacker could exploit this flaw to load malicious firmware onto the device. (cisco-sa-20190925-iosxe-digsig-bypass)

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvj87117, CSCvk12460

See Also

http://www.nessus.org/u?cb9bf05a

http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-72547

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvj87117

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk12460

Plugin Details

Severity: Medium

ID: 134562

File Name: cisco-sa-20190925-iosxe-digsig-bypass.nasl

Version: 1.6

Type: local

Family: CISCO

Published: 3/13/2020

Updated: 1/8/2021

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-2019-12649

CVSS v3

Risk Factor: Medium

Base Score: 6.7

Temporal Score: 5.8

Vector: CVSS:3.0/AV:L/AC:L/PR:H/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/local_checks_enabled, Host/Cisco/IOS-XE/Version, Host/Cisco/IOS-XE/Model

Exploit Ease: No known exploits are available

Patch Publication Date: 9/25/2019

Vulnerability Publication Date: 9/25/2019

Reference Information

CVE: CVE-2019-12649