CVE-2025-30645
Severity CVSS v4.0:
HIGH
Type:
CWE-476
NULL Pointer Dereference
Publication date:
09/04/2025
Last modified:
11/04/2025
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.<br />
<br />
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.<br />
<br />
This issue affects Junos OS on SRX Series: <br />
* All versions before 21.2R3-S9, <br />
* from 21.4 before 21.4R3-S9, <br />
* from 22.2 before 22.2R3-S5, <br />
* from 22.4 before 22.4R3-S6, <br />
* from 23.2 before 23.2R2-S3, <br />
* from 23.4 before 23.4R2.
Impact
Base Score 4.0
8.70
Severity 4.0
HIGH
Base Score 3.x
7.50
Severity 3.x
HIGH