An Improper Neutralization of Special Elements vulnerability in Juniper Networks Junos OS Evolved commands allows a local, authenticated attacker with low privileges to escalate their privileges to 'root' leading to a full compromise of the system.

The Junos OS Evolved CLI doesn't properly handle command options in some cases, allowing users which execute specific CLI commands with a crafted set of parameters to escalate their privileges to root on shell level.

This issue affects Junos OS Evolved:

All versions before 20.4R3-S7-EVO,

21.2-EVO versions before 21.2R3-S8-EVO,

21.4-EVO versions before 21.4R3-S7-EVO, 

22.2-EVO versions before 22.2R3-EVO,

22.3-EVO versions before 22.3R2-EVO,

22.4-EVO versions before 22.4R2-EVO.

Juniper Networks, Inc. CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Juniper Networks, Inc. AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Juniper Networks, Inc. CWE-78

Juniper Networks, Inc. https://supportportal.juniper.net/JSA82975 [No types assigned]