CVE-2024-39519

Junos OS Evolved: ACX 7000 Series: Multicast traffic is looped in a multihoming EVPN MPLS scenario

Published Jul 11, 2024 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Description
An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved on ACX7000 Series allows an unauthenticated, adjacent attacker to cause a

Denial-of-Service (DoS).

On all ACX 7000 Series platforms running

Junos OS Evolved, and configured with IRBs, if a Customer Edge device (CE) device is dual homed to two Provider Edge devices (PE) a traffic loop will occur when the CE sends multicast packets. This issue can be triggered by IPv4 and IPv6 traffic.


This issue affects Junos OS Evolved: 

All versions from 22.2R1-EVO and later versions before 22.4R2-EVO,

This issue does not affect Junos OS Evolved versions before 22.1R1-EVO.

Remediation

Vendor Workaround

There are no known workarounds for this issue.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-38045 An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved on ACX7000 Series allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS). On all ACX 7000 Series platforms running Junos OS Evolved, and configured with IRBs, if a Customer Edge device (CE) device is dual homed to two Provider Edge devices (PE) a traffic loop will occur when the CE sends multicast packets. This issue can be triggered by IPv4 and IPv6 traffic. This issue affects Junos OS Evolved:  All versions from 22.2R1-EVO and later versions before 22.4R2-EVO, This issue does not affect Junos OS Evolved versions before 22.1R1-EVO.
References
History
Type Values Removed Values Added
First Time appeared Juniper
Juniper acx7024
Juniper acx7024x
Juniper acx7100-32c
Juniper acx7100-48l
Juniper acx7332
Juniper acx7348
Juniper acx7509
Juniper junos Os Evolved
CPEs cpe:2.3:h:juniper:acx7024:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:acx7024x:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:acx7100-32c:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:acx7100-48l:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:acx7332:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:acx7348:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:acx7509:-:*:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:22.4:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:22.4:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:22.4:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:22.4:r1:*:*:*:*:*:*
Vendors & Products Juniper
Juniper acx7024
Juniper acx7024x
Juniper acx7100-32c
Juniper acx7100-48l
Juniper acx7332
Juniper acx7348
Juniper acx7509
Juniper junos Os Evolved
Weaknesses

Sources

Status
PUBLISHED
Assigner
juniper
Published
Updated
Aug 2, 2024, 4:26 AM
Reserved
Jun 25, 2024, 3:12 PM
Status
Modified
Published
Jul 11, 2024, 4:15 PM
Modified
Jun 17, 2026, 7:42 AM