CVE Vulnerability

CVE-2021-31356

A command injection vulnerability in command processing on Juniper Networks Junos OS Evolved allows an attacker with authenticated CLI access to be able to bypass configured access protections to execute arbitrary shell commands within the context of the current user. The vulnerability allows an attacker to bypass command authorization restrictions assigned to their specific user account and execute commands that are available to the privilege level for which the user is assigned. For example, a user that is in the super-user login class, but restricted to executing specific CLI commands could exploit the vulnerability to execute any other command available to an unrestricted admin user. This vulnerability does not increase the privilege level of the user, but rather bypasses any CLI command restrictions by allowing full access to the shell. This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R3-S1-EVO; All versions of 21.1-EVO and 21.2-EVO.

7.2 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 10

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Scope

7.8 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://kb.juniper.net/JSA11221 Vendor Advisory
Configurations

Configuration 1

cpe:2.3:o:juniper:junos_os_evolved:20.4:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.1:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.1:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.1:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.2:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.2:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.2:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:21.1:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.4:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.4:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.4:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.4:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.4:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.4:r2-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.4:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:*
Information

Published : 2021-10-19 07:15

Updated : 2022-10-25 03:33

NVD link : CVE-2021-31356

Mitre link : CVE-2021-31356

Products Affected
No products.
CWE
CWE-78