Incorrect permission assignment for critical resource in Junos OS Evolved

1) Incorrect permission assignment for critical resource

EUVDB-ID: #VU82506

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-22248

CWE-ID: CWE-732 - Incorrect Permission Assignment for Critical Resource

Exploit availability: No

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

An Incorrect Permission Assignment vulnerability in shell processing of Juniper Networks Junos OS Evolved allows a low-privileged local user to modify the contents of a configuration file which could cause another user to execute arbitrary commands within the context of the follow-on user's session.

If the follow-on user is a high-privileged administrator, the attacker could leverage this vulnerability to take complete control of the target system.

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:21.2R2-S2-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:21.3R1-S1-EVO:*:*:*:*:*:*:*

External links

https://supportportal.juniper.net/s/article/2022-10-Security-Bulletin-Junos-OS-Evolved-Incorrect-file-permissions-can-allow-low-privileged-user-to-cause-another-user-to-execute-arbitrary-commands-CVE-2022-22248

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.