CVE-2025-30645: Junos OS: SRX Series: Transmission of specific control traffic sent out of a DS-Lite tunnel results in flowd crash
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.
Affected Software
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Frequently Asked Questions
What is the severity of CVE-2025-30645?
CVE-2025-30645 is classified as a critical vulnerability that can lead to a Denial of Service (DoS) due to a NULL Pointer Dereference.
How do I fix CVE-2025-30645?
To address CVE-2025-30645, upgrade your Junos OS to the latest recommended version as specified by Juniper Networks.
What impact does CVE-2025-30645 have on affected devices?
CVE-2025-30645 can cause the flowd process to crash, resulting in a Denial of Service condition on affected devices.
Which versions of Junos OS are affected by CVE-2025-30645?
CVE-2025-30645 affects Junos OS versions prior to 21.4R4, among others as noted in the CVE documentation.
Is there a workaround for CVE-2025-30645 if I cannot immediately upgrade?
No specific workarounds are provided for CVE-2025-30645, and the best mitigation is to apply the recommended software upgrades.