Privilege escalation in Junos OS Evolved ssh CLI

1) Execution with unnecessary privileges

EUVDB-ID: #VU68562

Risk: Low

CVSSv4.0: 5.9 [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:U/U:Clear]

CVE-ID: CVE-2022-22239

CWE-ID: CWE-250 - Execution with Unnecessary Privileges

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to unnecessary privileges used by the Management Daemon (mgd). A local low-privileged user can leverage the ssh CLI command to escalate privileges on the device and potentially remote systems.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: 20.4R1-EVO - 21.3R1-S1-EVO

CPE2.3

• cpe:2.3:o:juniper_networks:junos_os_evolved:20.4:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:21.1:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:21.2R2-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:21.3R1-S1-EVO:*:*:*:*:*:*:*

External links

https://kb.juniper.net/JSA69895

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.