CVE-2024-39542— Junos OS and Junos OS Evolved: A malformed CFM packet or specific transit traffic leads to FPC 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，该漏洞源于存在输入语法正确性验证不当漏洞，未经身份验证的网络攻击者可利用该漏洞发起拒绝服务(DoS)。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2024-39542
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Junos OS and Junos OS Evolved: A malformed CFM packet or specific transit traffic leads to FPC crash
Source: CVE Program / CVE List V5
Vulnerability Description
An Improper Validation of Syntactic Correctness of Input vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series with MPC10/11 or LC9600, MX304, and Junos OS Evolved on ACX Series and PTX Series allows an unauthenticated, network based attacker to cause a Denial-of-Service (DoS).
This issue can occur in two scenarios:
1. If a device, which is configured with SFLOW and ECMP, receives specific valid transit traffic, which is subject to sampling, the packetio process crashes, which in turn leads to an evo-aftman crash and causes the FPC to stop working until it is restarted. (This scenario is only applicable to PTX but not to ACX or MX.)
2. If a device receives a malformed CFM packet on an interface configured with CFM, the packetio process crashes, which in turn leads to an evo-aftman crash and causes the FPC to stop working until it is restarted. Please note that the CVSS score is for the formally more severe issue 1.
The CVSS score for scenario 2. is: 6.5 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
This issue affects Junos OS:
* All versions before 21.2R3-S4,
* 21.4 versions before 21.4R2,
* 22.2 versions before 22.2R3-S2;
Junos OS Evolved:
* All versions before 21.2R3-S8-EVO,
* 21.4 versions before 21.4R2-EVO.
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
N/A
Source: CVE Program / CVE List V5
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，该漏洞源于存在输入语法正确性验证不当漏洞，未经身份验证的网络攻击者可利用该漏洞发起拒绝服务(DoS)。
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-S4 | - |
|
| Juniper Networks | Junos OS Evolved | 0 ~ 21.2R3-S8-EVO | - |
|
II. Public POCs for CVE-2024-39542
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2024-39542
请登录查看更多情报信息。
Other References for CVE-2024-39542 (1)
-
https://supportportal.juniper.net/JSA83002 vendor-advisory
Same Patch Batch · Juniper Networks · 2024-07-11 · 29 CVEs total
| CVE-2024-39520 | 7.8 HIGH | Junos OS Evolved: CLI parameter processing issue allows privilege escalation |
| CVE-2024-39521 | 7.8 HIGH | Junos OS Evolved: CLI parameter processing issue allows privilege escalation |
| CVE-2024-39522 | 7.8 HIGH | Junos OS Evolved: CLI parameter processing issue allows privilege escalation |
| CVE-2024-39523 | 7.8 HIGH | Junos OS Evolved: CLI parameter processing issue allows privilege escalation |
| CVE-2024-39524 | 7.8 HIGH | Junos OS Evolved: CLI parameter processing issue allows privilege escalation |
| CVE-2024-39531 | 7.5 HIGH | Junos OS Evolved: ACX 7000 Series: Protocol specific DDoS configuration affects other prot |
| CVE-2024-39540 | 7.5 HIGH | Junos OS: SRX Series, and MX Series with SPC3: Specific valid TCP traffic can cause a pfe |
| CVE-2024-39545 | 7.5 HIGH | Junos OS: SRX Series, MX Series with SPC3 and NFX350: When VPN tunnels parameters are not |
| CVE-2024-39548 | 7.5 HIGH | Junos OS Evolved: Receipt of specific packets in the aftmand process will lead to a memory |
| CVE-2024-39549 | 7.5 HIGH | Junos OS and Junos OS Evolved: Receipt of malformed BGP path attributes leads to a memory |
| CVE-2024-39551 | 7.5 HIGH | Junos OS: SRX Series and MX Series with SPC3 and MS-MPC/MIC: Receipt of specific packets i |
| CVE-2024-39552 | 7.5 HIGH | Junos OS and Junos OS Evolved: Malformed BGP UPDATE causes RPD crash |
| CVE-2024-39530 | 7.5 HIGH | Junos OS: Attempting to access specific sensors on platforms not supporting these will lea |
| CVE-2024-39529 | 7.5 HIGH | Junos OS: SRX Series: If DNS traceoptions are configured in a DGA or tunnel detection scen |
| CVE-2024-39546 | 7.3 HIGH | Junos OS Evolved: Local low-privilege user can gain root permissions leading to privilege |
| CVE-2024-39550 | 6.5 MEDIUM | Junos OS: MX Series with SPC3 line card: Port flaps causes rtlogd memory leak leading to D |
| CVE-2024-39553 | 6.5 MEDIUM | Junos OS Evolved: Receipt of arbitrary data when sampling service is enabled, leads to par |
| CVE-2024-39519 | 6.5 MEDIUM | Junos OS Evolved: ACX 7000 Series: Multicast traffic is looped in a multihoming EVPN MPLS |
| CVE-2024-39543 | 6.5 MEDIUM | Junos OS and Junos OS Evolved: Receipt of a large RPKI-RTR PDU packet can cause rpd to cra |
| CVE-2024-39541 | 6.5 MEDIUM | Junos OS and Junos OS Evolved: Inconsistent information in the TE database can lead to an |
Showing top 20 of 29 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Junos OS
-
CVE-2026-57054
Junos OS: MX Series: Web filtering doesn't block specificall -
CVE-2026-57032
Junos OS: EX Series: Subscribing to an unsupported telemetry -
CVE-2026-57031
Junos OS: MX Series: For subscribers configured on static in -
CVE-2026-57030
Junos OS: SRX Series: Flow sessions are not getting cleared -
CVE-2026-57027
Junos OS: EX4100 Series, EX4400: With sFlow configured in a
Same vendor: Juniper Networks
-
CVE-2026-57054
Junos OS: MX Series: Web filtering doesn't block specificall -
CVE-2026-57032
Junos OS: EX Series: Subscribing to an unsupported telemetry -
CVE-2026-57031
Junos OS: MX Series: For subscribers configured on static in -
CVE-2026-57030
Junos OS: SRX Series: Flow sessions are not getting cleared -
CVE-2026-57029
Junos OS Evolved: QFX Series: When sFlow collector reachabil
V. Comments for CVE-2024-39542
No comments yet