Juniper Networks Junos OS Evolved prior 22.3R2-EVO CLI os command injection

Summaryinfo

A vulnerability was found in Juniper Networks Junos OS Evolved. It has been rated as critical. This issue affects some unknown processing of the component CLI. The manipulation leads to os command injection. This vulnerability is uniquely identified as CVE-2024-39520. Local access is required to approach this attack. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Juniper Networks Junos OS Evolved. It has been rated as critical. This issue affects an unknown function of the component CLI. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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 version before 20.4R3-S6-EVO,  * 21.2-EVO versions before 21.2R3-S4-EVO, * 21.4-EVO versions before 21.4R3-S6-EVO,  * 22.2-EVO versions before 22.2R2-S1-EVO, 22.2R3-EVO,  * 22.3-EVO versions before 22.3R2-EVO.

It is possible to read the advisory at supportportal.juniper.net. The identification of this vulnerability is CVE-2024-39520 since 06/25/2024. The exploitation is known to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/23/2024). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

Upgrading to version 20.4R3-S6-EVO, 21.2R3-S4-EVO, 21.4R3-S6-EVO, 22.2R2-S1-EVO, 22.2R3-EVO or 22.3R2-EVO eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Juniper Networks

Name

• Junos OS Evolved

License

• commercial

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CPE 2.2info

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