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CVE-2023-44189— Junos OS Evolved: PTX10003 Series: MAC address validation bypass vulnerability

Quick assessment

Affected
Juniper Networks Junos OS Evolved
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Juniper Networks Junos OS Evolved是美国瞻博网络（Juniper Networks）公司的Junos OS 的升级版系统。 Juniper Networks Junos OS Evolved 存在安全漏洞。攻击者利用该漏洞绕过MAC地址检查，从而允许将不打算到达相邻LAN的MAC地址转发到下游网络。

CVSS 6.1 · Medium EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1040 · Network Sniffing
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I. Basic Information for CVE-2023-44189

Vulnerability Information
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Vulnerability Title
Junos OS Evolved: PTX10003 Series: MAC address validation bypass vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
An Origin Validation vulnerability in MAC address validation of Juniper Networks Junos OS Evolved on PTX10003 Series allows a network-adjacent attacker to bypass MAC address checking, allowing MAC addresses not intended to reach the adjacent LAN to be forwarded to the downstream network. Due to this issue, the router will start forwarding traffic if a valid route is present in forwarding-table, causing a loop and congestion in the downstream layer-2 domain connected to the device. This issue affects Juniper Networks Junos OS Evolved on PTX10003 Series: * All versions prior to 21.4R3-S4-EVO; * 22.1 versions prior to 22.1R3-S3-EVO; * 22.2 version 22.2R1-EVO and later versions; * 22.3 versions prior to 22.3R2-S2-EVO, 22.3R3-S1-EVO; * 22.4 versions prior to 22.4R2-S1-EVO, 22.4R3-EVO; * 23.2 versions prior to 23.2R2-EVO.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS Evolved 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS Evolved是美国瞻博网络（Juniper Networks）公司的Junos OS 的升级版系统。 Juniper Networks Junos OS Evolved 存在安全漏洞。攻击者利用该漏洞绕过MAC地址检查，从而允许将不打算到达相邻LAN的MAC地址转发到下游网络。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Juniper Networks Junos OS Evolved 0 ~ 21.4R3-S4-EVO -

II. Public POCs for CVE-2023-44189

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III. Intelligence Information for CVE-2023-44189

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Other References for CVE-2023-44189 (1)

Same Patch Batch · Juniper Networks · 2023-10-11 · 5 CVEs total

CVE-2023-44186 7.5 HIGH Junos OS and Junos OS Evolved: RPD crash when attempting to send a very long AS PATH to a
CVE-2023-44190 6.1 MEDIUM Junos OS Evolved: PTX10001, PTX10004, PTX10008, PTX10016: MAC address validation bypass vu
CVE-2023-44187 5.9 MEDIUM Junos OS Evolved: 'file copy' CLI command can disclose password to shell users
CVE-2023-44188 5.3 MEDIUM Junos OS: jkdsd crash due to multiple telemetry requests

IV. Related Vulnerabilities

Same product: Junos OS Evolved
Same vendor: Juniper Networks
Same weakness: CWE-346

V. Comments for CVE-2023-44189

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