CVE-2025-30645 Information

Description

A NULL Pointer Dereference vulnerability in the flow daemon (flowd) of Juniper Networks Junos OS on SRX Series allows an attacker causing specific valid control traffic to be sent out of a Dual-Stack (DS) Lite tunnel to crash the flowd process resulting in a Denial of Service (DoS).  Continuous triggering of specific control traffic will create a sustained Denial of Service (DoS) condition.

On all SRX platforms when specific valid control traffic needs to be sent out of a DS-Lite tunnel a segmentation fault occurs within the flowd process resulting in a network outage until the flowd process restarts.

This issue affects Junos OS on SRX Series: All versions before 21.2R3-S9 from 21.4 before 21.4R3-S9 from 22.2 before 22.2R3-S5 from 22.4 before 22.4R3-S6 from 23.2 before 23.2R2-S3 from 23.4 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/JSA96455

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