MAC address validation bypass in Junos OS Evolved on PTX10003 series

1) Missing origin validation in websockets

EUVDB-ID: #VU82110

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-2023-44189

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 PTX10003 series devices.

Vulnerable software versions

Junos OS Evolved: 21.4R1-EVO - 23.2R1-S1-EVO

CPE2.3

• cpe:2.3:o:juniper_networks:junos_os_evolved:21.4R3-S3-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:22.1R3-S2-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:22.3R2-S1-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:22.4R2-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:23.2R1-S1-EVO:*:*:*:*:*:*:*

External links

https://supportportal.juniper.net/s/article/2023-10-Security-Bulletin-Junos-OS-Evolved-PTX10003-Series-MAC-address-validation-bypass-vulnerability-CVE-2023-44189

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.