CVE-2025-30645: Junos OS: SRX Series: Transmission of specific control traffic sent out of a DS-Lite tunnel results in flowd crash
First published: Wed Apr 09 2025(Updated: )
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.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Juniper JUNOS | <21.2R3-S9>=21.4<21.4R3-S9>=22.2<22.2R3-S5>=22.4<22.4R3-S6>=23.2<23.2R2-S3>=23.4<23.4R2 |
Remedy
The following software releases have been updated to resolve this specific issue: Junos OS 21.2R3-S9, 21.4R3-S9, 22.2R3-S5, 22.4R3-S6, 23.2R2-S3, 23.4R2, 24.2R1, and all subsequent releases.
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
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.
- collector/mitre-cve
- source/MITRE
- agent/title
- agent/weakness
- agent/references
- agent/remedy
- agent/type
- agent/description
- agent/first-publish-date
- agent/guess-ai
- agent/software-canonical-lookup
- agent/softwarecombine
- collector/nvd-api
- source/NVD
- agent/severity
- agent/last-modified-date
- agent/source
- agent/author
- agent/tags
- agent/event
- vendor/juniper networks
- canonical/juniper junos