CVE Vulnerabilities

CVE-2021-1453

Improper Verification of Cryptographic Signature

Published: Mar 24, 2021 | Modified: Mar 29, 2021
CVSS 3.x
6.8
MEDIUM
Source:
NVD
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.2 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
Ubuntu

A vulnerability in the software image verification functionality of Cisco IOS XE Software for the Cisco Catalyst 9000 Family of switches could allow an unauthenticated, physical attacker to execute unsigned code at system boot time. The vulnerability is due to an improper check in the code function that manages the verification of the digital signatures of system image files during the initial boot process. An attacker could exploit this vulnerability by loading unsigned software on an affected device. A successful exploit could allow the attacker to boot a malicious software image or execute unsigned code and bypass the image verification check part of the secure boot process of an affected device. To exploit this vulnerability, the attacker would need to have unauthenticated physical access to the device or obtain privileged access to the root shell on the device.

Weakness

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

Affected Software

Name Vendor Start Version End Version
Ios_xe Cisco 16.6.1 16.6.1
Ios_xe Cisco 16.6.3 16.6.3
Ios_xe Cisco 16.8.1 16.8.1
Ios_xe Cisco 16.7.1 16.7.1
Ios_xe Cisco 16.6.2 16.6.2
Ios_xe Cisco 16.9.1 16.9.1
Ios_xe Cisco 16.8.1a 16.8.1a
Ios_xe Cisco 16.8.1s 16.8.1s
Ios_xe Cisco 16.9.1s 16.9.1s
Ios_xe Cisco 16.6.4s 16.6.4s
Ios_xe Cisco 16.6.4 16.6.4
Ios_xe Cisco 16.10.1 16.10.1
Ios_xe Cisco 16.9.2 16.9.2
Ios_xe Cisco 16.6.4a 16.6.4a
Ios_xe Cisco 16.12.1 16.12.1
Ios_xe Cisco 16.6.5 16.6.5
Ios_xe Cisco 16.11.1 16.11.1
Ios_xe Cisco 17.1.1 17.1.1
Ios_xe Cisco 16.12.1c 16.12.1c
Ios_xe Cisco 16.11.2 16.11.2
Ios_xe Cisco 16.12.1s 16.12.1s
Ios_xe Cisco 16.11.1c 16.11.1c
Ios_xe Cisco 16.11.1b 16.11.1b
Ios_xe Cisco 16.11.1s 16.11.1s
Ios_xe Cisco 16.10.1s 16.10.1s
Ios_xe Cisco 16.9.2s 16.9.2s
Ios_xe Cisco 16.6.6 16.6.6
Ios_xe Cisco 16.9.3 16.9.3
Ios_xe Cisco 16.10.1e 16.10.1e
Ios_xe Cisco 16.9.3s 16.9.3s
Ios_xe Cisco 16.9.4 16.9.4
Ios_xe Cisco 16.12.2 16.12.2
Ios_xe Cisco 16.6.7 16.6.7
Ios_xe Cisco 16.12.4 16.12.4
Ios_xe Cisco 16.9.5 16.9.5
Ios_xe Cisco 16.6.8 16.6.8
Ios_xe Cisco 16.12.3 16.12.3
Ios_xe Cisco 17.2.1 17.2.1
Ios_xe Cisco 17.4.1 17.4.1
Ios_xe Cisco 17.1.1s 17.1.1s
Ios_xe Cisco 16.12.2t 16.12.2t
Ios_xe Cisco 16.12.2s 16.12.2s
Ios_xe Cisco 16.12.3a 16.12.3a
Ios_xe Cisco 17.1.1t 17.1.1t
Ios_xe Cisco 17.2.1a 17.2.1a
Ios_xe Cisco 3.15.2xbs 3.15.2xbs
Ios_xe Cisco 16.12.3s 16.12.3s
Ios_xe Cisco 3.15.1xbs 3.15.1xbs
Ios_xe Cisco 17.1.2 17.1.2
Ios_xe Cisco 16.12.4a 16.12.4a
Ios_xe Cisco 17.3.1 17.3.1
Ios_xe Cisco 17.3.2 17.3.2
Ios_xe Cisco 17.3.2a 17.3.2a
Ios_xe Cisco 17.2.3 17.2.3
Ios_xe Cisco 16.9.6 16.9.6

References