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CVE-2024-39561— Junos OS: SRX4600, SRX5000 Series: TCP packets with SYN/FIN or SYN/RST are transferred after enabling no-syn-check with Express Path

CVSS 5.8 · Medium EPSS 0.12% · P30
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I. Basic Information for CVE-2024-39561

Vulnerability Information
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Vulnerability Title
Junos OS: SRX4600, SRX5000 Series: TCP packets with SYN/FIN or SYN/RST are transferred after enabling no-syn-check with Express Path
Source: NVD (National Vulnerability Database)
Vulnerability Description
An Improper Check for Unusual or Exceptional Conditions vulnerability in the flow daemon (flowd) of Juniper Networks Junos OS on SRX4600 and SRX5000 Series allows an attacker to send TCP packets with SYN/FIN or SYN/RST flags, bypassing the expected blocking of these packets. A TCP packet with SYN/FIN or SYN/RST should be dropped in flowd. However, when no-syn-check and Express Path are enabled, these TCP packets are unexpectedly transferred to the downstream network. This issue affects Junos OS on SRX4600 and SRX5000 Series: * All versions before 21.2R3-S8, * from 21.4 before 21.4R3-S7, * from 22.1 before 22.1R3-S6, * from 22.2 before 22.2R3-S4, * from 22.3 before 22.3R3-S3, * from 22.4 before 22.4R3-S2, * from 23.2 before 23.2R2, * from 23.4 before 23.4R1-S1, 23.4R2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对因果或异常条件的不恰当检查
Source: NVD (National Vulnerability Database)
Vulnerability Title
Juniper Networks Junos OS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS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存在安全漏洞，该漏洞源于流守护程序中存在对异常或异常情况检查不当的漏洞，允许攻击者通过发送带有SYN/FIN或SYN/RST标志的TCP数据包来绕过预期阻止。受影响的平台如下：SRX4600、SRX5000。
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

VendorProductAffected VersionsCPESubscribe
Juniper NetworksJunos OS 0 ~ 21.2R3-S8 -

II. Public POCs for CVE-2024-39561

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III. Intelligence Information for CVE-2024-39561

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Same Patch Batch · Juniper Networks · 2024-07-10 · 15 CVEs total

CVE-2024-395187.5 HIGHJunos OS: MX240, MX480, MX960 platforms using MPC10E: Memory leak will be observed when su
CVE-2024-395627.5 HIGHJunos OS Evolved: A high rate of SSH connections causes a Denial of Service
CVE-2024-395557.5 HIGHJunos OS and Junos OS Evolved: Receipt of a specific malformed BGP update causes the sessi
CVE-2024-395126.6 MEDIUMJunos OS Evolved: User is not logged out when the console cable is disconnected
CVE-2024-395176.5 MEDIUMJunos OS and Junos OS Evolved: Upon processing specific L2 traffic, rpd can hang in device
CVE-2024-395146.5 MEDIUMJunos OS and Junos OS Evolved: Receiving specific traffic on devices with EVPN-VPWS with I
CVE-2024-395606.5 MEDIUMJunos OS and Junos OS Evolved: Memory leak due to RSVP neighbor persistent error leading t
CVE-2024-395586.5 MEDIUMJunos OS and Junos OS Evolved: Receipt of specific PIM packet causes rpd crash when PIM is
CVE-2024-395576.5 MEDIUMJunos OS Evolved: MAC table changes cause a memory leak
CVE-2024-395566.4 MEDIUMJunos OS and Junos OS Evolved: Loading a malicious certificate from the CLI may result in
CVE-2024-395595.9 MEDIUMJunos OS Evolved: Receipt of a specific TCP packet may result in a system crash (vmcore) o
CVE-2024-395545.9 MEDIUMJunos OS and Junos OS Evolved: BGP multipath incremental calculation is resulting in an rp
CVE-2024-395135.5 MEDIUMJunos OS Evolved: Execution of a specific CLI command will cause a crash in the AFT manage
CVE-2024-395115.5 MEDIUMJunos OS: The 802.1X Authentication Daemon crashes on running a specific command

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks
Same weakness: CWE-754

V. Comments for CVE-2024-39561

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