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CVE-2025-30645— Junos OS: SRX Series: Transmission of specific control traffic sent out of a DS-Lite tunnel results in flowd crash

Quick assessment

Affected

Juniper Networks Junos OS

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Juniper Networks Junos OS SRX是美国瞻博网络（Juniper Networks）公司的一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。 Juniper Networks Junos OS SRX存在代码问题漏洞，该漏洞源于flowd存在空指针取消引用，可能导致拒绝服务。

CVSS 7.5 · High EPSS 0.42% · P37 Updated Apr 29, 2025

Possible ATT&CK Techniques 2 AI

T1499 · Endpoint Denial of Service T1499.001 · OS Exhaustion Flood

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I. Basic Information for CVE-2025-30645

Vulnerability Information

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Vulnerability Title

Junos OS: SRX Series: Transmission of specific control traffic sent out of a DS-Lite tunnel results in flowd crash

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

空指针解引用

Source: CVE Program / CVE List V5

Vulnerability Title

Juniper Networks Junos OS SRX 代码问题漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Juniper Networks	Junos OS	0 ~ 21.2R3-S9	-

II. Public POCs for CVE-2025-30645

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2025-30645

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https://www.cve.org/CVERecord?id=CVE-2025-30645

Same Patch Batch · Juniper Networks · 2025-04-09 · 21 CVEs total

CVE-2025-30659	7.5 HIGH	Junos OS: SRX Series: A device configured for vector routing crashes when receiving malfor
CVE-2025-21594	7.5 HIGH	Junos OS: MX Series: In DS-lite and NAT scenario receipt of crafted IPv6 traffic causes po
CVE-2025-21601	7.5 HIGH	Junos OS: SRX and EX Series, MX240, MX480, MX960, QFX5120 Series: When web management is e
CVE-2025-30644	7.5 HIGH	Junos OS: EX2300, EX3400, EX4000 Series, QFX5k Series: Receipt of a specific DHCP packet c
CVE-2025-30649	7.5 HIGH	Junos OS: MX240, MX480, MX960 with SPC3: An attacker sending specific packets will cause a
CVE-2025-30651	7.5 HIGH	Junos OS and Junos OS Evolved: Receipt of a specific ICMPv6 packet causes a memory overrun
CVE-2025-30656	7.5 HIGH	Junos OS: MX Series, SRX Series: Processing of specific SIP INVITE messages by the SIP ALG
CVE-2025-30658	7.5 HIGH	Junos OS: SRX Series: On devices with Anti-Virus enabled, malicious server responses will
CVE-2025-30660	7.5 HIGH	Junos OS: MX Series: Decapsulation of specific GRE packets leads to PFE reset
CVE-2025-30648	7.4 HIGH	Junos OS and Junos OS Evolved: Receipt of a specifically malformed DHCP packet causes jdhc
CVE-2025-21591	7.4 HIGH	Junos OS: An unauthenticated adjacent attacker sending a malformed DHCP packet causes jdhc
CVE-2025-30653	6.5 MEDIUM	Junos OS and Junos OS Evolved: LSP flap in a specific MPLS scenario leads to rpd crash
CVE-2025-30647	6.5 MEDIUM	Junos OS: MX Series: Subscriber login/logout activity will lead to a memory leak
CVE-2025-30646	6.5 MEDIUM	Junos OS and Junos OS Evolved: Receipt of a malformed LLDP TLV results in l2cpd crash
CVE-2025-21595	6.5 MEDIUM	Junos OS and Junos OS Evolved: In an EVPN-VXLAN scenario specific ARP or NDP packets cause
CVE-2025-30654	5.5 MEDIUM	Junos OS and Junos OS Evolved: A local, low privileged user can access sensitive informati
CVE-2025-30652	5.5 MEDIUM	Junos OS and Junos OS Evolved: Executing a specific CLI command when asregex-optimized is
CVE-2025-30655	5.5 MEDIUM	Junos OS and Junos OS Evolved: A specific CLI command will cause an RPD crash when rib-sha
CVE-2025-30657	5.3 MEDIUM	Junos OS: Processing of a specific BGP update causes the SRRD process to crash
CVE-2025-21597	5.3 MEDIUM	Junos OS and Junos OS Evolved: When BGP rib-sharding and update-threading are configured a

IV. Related Vulnerabilities

Same product: Junos OS

Same vendor: Juniper Networks

Same weakness: CWE-476