Vulnerability in Juniper Junos OS Evolved
CVE-2023-44189
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.
EPSS: 0.002 (7.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L.
Affected products
- Juniper Junos_os_evolved — versions 21.4, 22.1, 22.2
- Juniper Ptx10003
- Juniper Ptx10003_160c
- Juniper Ptx10003_80c
- Juniper Ptx10003_81cd
- Juniper Networks Junos Os Evolved — versions 0, 22.1, 22.2R1-EVO
Weakness classification (CWE)
Public proof-of-concept exploits
References
- sirt@juniper.net (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2023-44189?
- CVE-2023-44189 is a medium-severity vulnerability in Juniper Junos OS Evolved, classified under Origin Validation Error. CVSS score: 6.1/10. Published 2023-10-11.
- How severe is CVE-2023-44189?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2023-44189 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.