Juniper Networks Junos OS Evolved prior 22.4R2-EVO CLI os command injection

Summaryinfo

A vulnerability classified as critical has been found in Juniper Networks Junos OS Evolved. Affected is an unknown function of the component CLI. The manipulation leads to os command injection. This vulnerability is listed as CVE-2024-39523. The attack must be carried out locally. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Juniper Networks Junos OS Evolved and classified as critical. This issue affects some unknown processing 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 versions before 20.4R3-S7-EVO, * 21.2-EVO versions before 21.2R3-S8-EVO, * 21.4-EVO versions before 21.4R3-S7-EVO, * 22.1-EVO versions before 22.1R3-S6-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.

The advisory is shared at supportportal.juniper.net. The identification of this vulnerability is CVE-2024-39523 since 06/25/2024. The exploitation is known to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/23/2024). MITRE ATT&CK project uses the attack technique T1202 for this issue.

Upgrading to version 20.4R3-S7-EVO, 21.2R3-S8-EVO, 21.4R3-S7-EVO, 22.1R3-S6-EVO, 22.2R3-EVO, 22.3R2-EVO or 22.4R2-EVO eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• Juniper Networks

Name

• Junos OS Evolved

License

• commercial

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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