MAC address validation bypass in Junos OS Evolved

1) Missing origin validation in websockets

EUVDB-ID: #VU82109

Risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-44190

CWE-ID: N/A

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to origin validation error in MAC address validation. A remote attacker on the local network can bypass MAC address checking and gain unauthorized access to network resources.

Mitigation

Install updates from vendor's website for the following devices: PTX10001, PTX10004, PTX10008, and PTX10016.

Vulnerable software versions

Junos OS Evolved: 21.4R1-EVO - 23.2R1-EVO

CPE2.3

• cpe:2.3:o:juniper_networks:junos_os_evolved:21.4R1-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:21.4R1-S1-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:21.4R1-S2-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:21.4R2-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:21.4R2-S1-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:21.4R2-S2-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:21.4R3-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:21.4R3-S1-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:21.4R3-S2-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:21.4R3-S3-EVO:*:*:*:*:*:*:*

External links

https://supportportal.juniper.net/s/article/2023-10-Security-Bulletin-Junos-OS-Evolved-PTX10001-PTX10004-PTX10008-PTX10016-MAC-address-validation-bypass-vulnerability-CVE-2023-44190

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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