An Exposure of Resource to Wrong Sphere vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to bypass the intended access restrictions.
In an Abstracted Fabric (AF) scenario if routing-instances (RI) are configured, specific valid traffic destined to the device can bypass the configured lo0 firewall filters as it's received in the wrong RI context.
This issue affects Juniper Networks Junos OS on MX Series:
* All versions earlier than 20.4R3-S9;
* 21.2 versions earlier than 21.2R3-S3;
* 21.4 versions earlier than 21.4R3-S5;
* 22.1 versions earlier than 22.1R3;
* 22.2 versions earlier than 22.2R3;
* 22.3 versions earlier than 22.3R2.
Metrics
Affected Vendors & Products
Solution
The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S9, 21.2R3-S3, 21.4R3-S5, 22.1R3, 22.2R3, 22.3R2, 22.4R1, and all subsequent releases.
Workaround
There are no known workarounds for this issue.
Tue, 03 Jun 2025 14:15:00 +0000
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Status: PUBLISHED
Assigner: juniper
Published:
Updated: 2025-06-03T14:05:47.674Z
Reserved: 2023-12-27T19:38:25.705Z
Link: CVE-2024-21597

Updated: 2024-08-01T22:27:35.795Z

Status : Modified
Published: 2024-01-12T01:15:47.460
Modified: 2024-11-21T08:54:41.213
Link: CVE-2024-21597

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