CVE-2025-30660 Information

Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated network-based attacker to cause a Denial-of-Service (DoS).When processing a high rate of specific GRE traffic destined to the device the respective PFE will hang causing traffic forwarding to stop.

When this issue occurs the following logs can be observed:

MQSS(0): LI-3: Received a parcel with more than 512B accompanying data CHASSISD_FPC_ASIC_ERROR: ASIC Error detected <…>

This issue affects Junos OS:

all versions before 21.2R3-S9
21.4 versions before 21.4R3-S8
22.2 versions before 22.2R3-S4
22.4 versions before 22.4R3-S5
23.2 versions before 23.2R2-S2
23.4 versions before 23.4R2.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://supportportal.juniper.net/JSA96471

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5