Junos OS Evolved: User is not logged out when the console cable is disconnected
Key facts
- Attack vector
- Physical
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
An Improper Physical Access Control vulnerability in the console port control of Juniper Networks Junos OS Evolved allows an attacker with physical access to the device to get access to a user account. When the console cable is disconnected, the logged in user is not logged out. This allows a malicious attacker with physical access to the console to resume a previous session and possibly gain administrative privileges. This issue affects Junos OS Evolved: * from 23.2R2-EVO before 23.2R2-S1-EVO, * from 23.4R1-EVO before 23.4R2-EVO.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Juniper | Junos OS Evolved | 23.2R2-EVO to before 23.2R2-S1-EVO; 23.4R1-EVO to before 23.4R2-EVO | 23.2R2-S1-EVO, 23.4R2-EVO | Patch available | CNA |
- Junos OS Evolved VendorJuniper Affected 23.2R2-EVO to before 23.2R2-S1-EVO; 23.4R1-EVO to before 23.4R2-EVO Fixed in 23.2R2-S1-EVO, 23.4R2-EVO Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:juniper:junos_os_evolved:23.2:r2:*:*:*:*:*:* | 23.2 r2 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos_os_evolved:23.4:r1:*:*:*:*:*:* | 23.4 r1 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos_os_evolved:23.4:r1-s1:*:*:*:*:*:* | 23.4 r1-s1 | Vulnerable | Juniper |
| cpe:2.3:o:juniper:junos_os_evolved:23.4:r1-s2:*:*:*:*:*:* | 23.4 r1-s2 | Vulnerable | Juniper |
- cpe:2.3:o:juniper:junos_os_evolved:23.2:r2:*:*:*:*:*:* Versions 23.2 r2 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos_os_evolved:23.4:r1:*:*:*:*:*:* Versions 23.4 r1 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos_os_evolved:23.4:r1-s1:*:*:*:*:*:* Versions 23.4 r1-s1 Vulnerable ·Juniper
- cpe:2.3:o:juniper:junos_os_evolved:23.4:r1-s2:*:*:*:*:*:* Versions 23.4 r1-s2 Vulnerable ·Juniper
Remediation
- Fix · CNA Junos OS Evolved (Juniper Networks) Fixed in 23.2R2-S1-EVO, 23.4R2-EVO
Timeline
- 2026-10-02 Threatist record created from CVE-2024-39512
- 2026-10-03 Alias added: GHSA-7x3w-3vjx-fhqv
References
More Juniper Junos Os Evolved vulnerabilities
- TI-2026-17602 Junos OS Evolved: PTX Series: A vulnerability allows a unauthenticated, network-based attacker to execute code as root CVSS 4.0CRITICAL 9.3
- TI-2026-17601 Junos OS and Junos OS Evolved: Configuration of a specific SSH option results in mgd crash CVSS 4.0MEDIUM 6.7
- TI-2023-04136 Improper input validation in Juniper Junos OS CVSS 3.1HIGH 7.5
- TI-2026-74215 Stack-based buffer overflow in Junos OS rpd triggered by BGP peers CVSS 4.0CRITICAL 9.3
- TI-2026-74211 Authentication bypass in Juniper J-Web allows pre-auth CGI execution CVSS 4.0CRITICAL 9.3
- TI-2021-00146 Junos OS and Junos OS Evolved: Upon receipt of a specific BGP FlowSpec message network traffic may be disrupted. CVSS 3.1CRITICAL 10.0
Sources
- CVE-2024-39512 · CVE Program
- CVE-2024-39512 · NVD
- FIRST EPSS
- GHSA-7x3w-3vjx-fhqv · GitHub Advisory Database · CC BY 4.0
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