CVE-2024-30403

Junos OS Evolved: When MAC learning happens, and an interface gets flapped, the PFE crashes

Published Apr 12, 2024 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Description
A NULL Pointer Dereference vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).

When Layer 2 traffic is sent through a logical interface, MAC learning happens. If during this process, the interface flaps, an Advanced Forwarding Toolkit manager (evo-aftmand-bt) core is observed. This leads to a PFE restart. The crash reoccurs if the same sequence of events happens, which will lead to a sustained DoS condition.

This issue affects Juniper Networks Junos OS Evolved 23.2-EVO versions earlier than 23.2R1-S1-EVO, 23.2R2-EVO.

Remediation

Vendor Solution

The following software releases have been updated to resolve this specific issue: 23.2R1-S1-EVO, 23.2R2-EVO, 23.4R1-EVO, and all subsequent releases.


Vendor Workaround

There are no known workarounds for this issue.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-28324 A NULL Pointer Dereference vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS). When Layer 2 traffic is sent through a logical interface, MAC learning happens. If during this process, the interface flaps, an Advanced Forwarding Toolkit manager (evo-aftmand-bt) core is observed. This leads to a PFE restart. The crash reoccurs if the same sequence of events happens, which will lead to a sustained DoS condition. This issue affects Juniper Networks Junos OS Evolved 23.2-EVO versions earlier than 23.2R1-S1-EVO, 23.2R2-EVO.
History
Type Values Removed Values Added
First Time appeared Juniper
Juniper junos Os Evolved
CPEs cpe:2.3:o:juniper:junos_os_evolved:23.2:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:23.2:r1:*:*:*:*:*:*
Vendors & Products Juniper
Juniper junos Os Evolved
Weaknesses

Sources

Status
PUBLISHED
Assigner
juniper
Published
Updated
Aug 2, 2024, 1:32 AM
Reserved
Mar 26, 2024, 11:06 PM
Status
Analyzed
Published
Apr 12, 2024, 4:15 PM
Modified
Jun 17, 2026, 7:26 AM