CVE-2025-30644 Information

Description

A Heap-based Buffer Overflow vulnerability in the flexible PIC concentrator (FPC) of Juniper Networks Junos OS on EX2300 EX3400 EX4100 EX4300 EX4300MP EX4400 EX4600 EX4650-48Y and QFX5k Series allows an attacker to send a specific DHCP packet to the device leading to an FPC crash and restart resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.

Under a rare timing scenario outside the attacker’s control memory corruption may be observed when DHCP Option 82 is enabled leading to an FPC crash and affecting packet forwarding. Due to the nature of the heap-based overflow exploitation of this vulnerability could also lead to remote code execution within the FPC resulting in complete control of the vulnerable component. This issue affects Junos OS on EX2300 EX3400 EX4100 EX4300 EX4300MP EX4400 EX4600 EX4650-48Y and QFX5k Series:

All versions before 21.4R3-S9 
from 22.2 before 22.2R3-S5 
from 22.4 before 22.4R3-S5 
from 23.2 before 23.2R2-S3 
from 23.4 before 23.4R2-S3 
from 24.2 before 24.2R2.

CVSS Vector

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

Reference

https://supportportal.juniper.net/JSA96453

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.5