CVE-2025-30648 Information

Description

An Improper Input Validation vulnerability in the Juniper DHCP Daemon (jdhcpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause the jdhcpd process to crash resulting in a Denial of Service (DoS).

When a specifically malformed DHCP packet is received from a DHCP client the jdhcpd process crashes which will lead to the unavailability of the DHCP service and thereby resulting in a sustained DoS. The DHCP process will restart automatically to recover the service.

This issue will occur when dhcp-security is enabled.  This issue affects Junos OS: 

All versions before 21.2R3-S9 
from 21.4 before 21.4R3-S10 
from 22.2 before 22.2R3-S6 
from 22.4 before 22.4R3-S6 
from 23.2 before 23.2R2-S3 
from 23.4 before 23.4R2-S4 
from 24.2 before 24.2R2; 

Junos OS Evolved:  from 22.4 before 22.4R3-S6-EVO  from 23.2 before 23.2R2-S3-EVO  from 23.4 before 23.4R2-S4-EVO  from 24.2 before 24.2R2-EVO.

.

CVSS Vector

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

Reference

https://supportportal.juniper.net/JSA96458

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.4