Junos Os Evolved
CVE-2024-39553
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Resource sphere isolation
MITRE ATT&CK
1 technique across 1 tactic: Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 6.9 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available. |
| Exploit ScenarioDerived | A remote attacker could access resources from an unintended security context by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAI
An Exposure of Resource to Wrong Sphere vulnerability in the sampling service of Juniper Networks Junos OS Evolved allows an unauthenticated network-based attacker to send arbitrary data to the. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement proper access controls, validate resource access permissions, use security boundaries.
Affects your stack
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Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Exposure of Resource to Wrong Sphere (CWE-668), which allows attackers to access resources from an unintended security context. An Exposure of Resource to Wrong Sphere vulnerability in the sampling service of Juniper Networks Junos OS Evolved allows an unauthenticated network-based attacker to send arbitrary data to the device, which leads msvcsd process to crash with limited availability impacting Denial of Service (DoS) and allows unauthorized network access to the device, potentially impacting system integrity. This issue only happens when inline jflow is configured. This does not impact any forwarding traffic. The impacted services MSVCS-DB app crashes momentarily and recovers by itself.4 versions earlier than 21.4R3-S7-EVO; * 22.2 versions earlier than 22.2R3-S3-EVO; * 22.3 versions earlier than 22.3R3-S2-EVO; * 22.4 versions earlier than 22.4R3-EVO; * 23.2 versions earlier than 23.2R1-S2-EVO, 23.2R2-EVO. Affected products include: Juniper Junos Os Evolved.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:L/R:A
Primary rating from Vendor (juniper) · only source for this CVE.
CVSS VectorVendor: juniper
DescriptionCVE.org
An Exposure of Resource to Wrong Sphere vulnerability in the sampling service of Juniper Networks Junos OS Evolved allows an unauthenticated network-based attacker to send arbitrary data to the device, which leads msvcsd process to crash with limited availability impacting Denial of Service (DoS) and allows unauthorized network access to the device, potentially impacting system integrity.
This issue only happens when inline jflow is configured.
This does not impact any forwarding traffic. The impacted services MSVCS-DB app crashes momentarily and recovers by itself.
This issue affects Juniper Networks Junos OS Evolved:
- 21.4 versions earlier than 21.4R3-S7-EVO;
- 22.2 versions earlier than 22.2R3-S3-EVO;
- 22.3 versions earlier than 22.3R3-S2-EVO;
- 22.4 versions earlier than 22.4R3-EVO;
- 23.2 versions earlier than 23.2R1-S2-EVO, 23.2R2-EVO.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)CVE.org
More in Junos Os Evolved
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An unauthenticated attacker on an adjacent Layer 2 segment can sustain a denial-of-service condition against Juniper Jun
Unauthenticated OS command injection in Juniper Networks Junos OS Evolved's bootzd zero-touch provisioning (ZTP) daemon
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Authenticated, low-privileged TACACS+ users on Juniper Networks Junos OS Evolved can escalate to root and execute arbitr
A Missing Release of File Descriptor or Handle after Effective Lifetime vulnerability in plugable authentication module
Unauthenticated OS command injection in the bootzd zero-touch provisioning (ZTP) daemon of Juniper Networks Junos OS Evo
OS command injection in the phcd phone-home daemon of Juniper Networks Junos OS and Junos OS Evolved lets an adjacent, u
Heap-based buffer overflow in the sdxd service-deployment daemon of Juniper Networks Junos OS and Junos OS Evolved allow
Unauthenticated remote code execution with elevated privileges is possible in Juniper Junos OS and Junos OS Evolved thro
Remote root code execution in the routing protocol daemon (rpd) of Juniper Junos OS is reachable through protocol-valid
Remote code execution (on Junos OS) and rpd denial of service (on Junos OS and Junos OS Evolved) result from a stack-bas
GitHub PoC
Exploit-DB