Juniper Junos OS up to 24.2R1-S2 Kernel isolation

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Juniper Junos OS up to 24.2R1-S2. Affected by this issue is some unknown functionality of the component Kernel. Performing a manipulation results in isolation. This vulnerability was named CVE-2025-21590. The attack needs to be approached locally. In addition, an exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Juniper Junos OS up to 24.2R1-S2. It has been classified as problematic. This affects some unknown functionality of the component Kernel. The manipulation with an unknown input leads to a isolation vulnerability. CWE is classifying the issue as CWE-653. The product does not properly compartmentalize or isolate functionality, processes, or resources that require different privilege levels, rights, or permissions. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An Improper Isolation or Compartmentalization vulnerability in the kernel of Juniper Networks Junos OS allows a local attacker with high privileges to compromise the integrity of the device. A local attacker with access to the shell is able to inject arbitrary code which can compromise an affected device. This issue is not exploitable from the Junos CLI. This issue affects Junos OS:  * All versions before 21.2R3-S9, * 21.4 versions before 21.4R3-S10,  * 22.2 versions before 22.2R3-S6,  * 22.4 versions before 22.4R3-S6,  * 23.2 versions before 23.2R2-S3,  * 23.4 versions before 23.4R2-S4, * 24.2 versions before 24.2R1-S2, 24.2R2.

The advisory is shared at supportportal.juniper.net. This vulnerability is uniquely identified as CVE-2025-21590 since 12/26/2024. The exploitability is told to be easy. An attack has to be approached locally. Additional levels of successful authentication are necessary for exploitation. Technical details are unknown but an exploit is available.

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 232834 (Juniper Junos OS Local Arbitrary Code Execution (JSA93446)), which helps to determine the existence of the flaw in a target environment. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 03/13/2025 with a due date of 04/03/2025:

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Upgrading to version 21.2R3-S9, 21.4R3-S10, 22.2R3-S6, 22.4R3-S6, 23.2R2-S3, 23.4R2-S4, 24.2R1-S2 or 24.2R2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Zero-Day.cz (981) and Tenable (232834). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 4.4
CNA Vector (juniper): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Isolation
CWE: CWE-653
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 232834
Nessus Name: Juniper Junos OS Local Arbitrary Code Execution (JSA93446)

Zero-Day.cz: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Junos OS 21.2R3-S9/21.4R3-S10/22.2R3-S6/22.4R3-S6/23.2R2-S3/23.4R2-S4/24.2R1-S2/24.2R2

Timelineinfo

12/26/2024 🔍
03/12/2025 +76 days 🔍
03/12/2025 +0 days 🔍
03/18/2025 +6 days 🔍

Sourcesinfo

Vendor: juniper.net

Advisory: JSA93446
Status: Confirmed

CVE: CVE-2025-21590 (🔍)
GCVE (CVE): GCVE-0-2025-21590
GCVE (VulDB): GCVE-100-299553
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/12/2025 15:16
Updated: 03/18/2025 01:37
Changes: 03/12/2025 15:16 (77), 03/13/2025 20:01 (13), 03/14/2025 11:38 (1), 03/14/2025 20:07 (2), 03/18/2025 01:37 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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