A PHP External Variable Modification vulnerability in J-Web of Juniper Networks Junos OS on EX Series allows an unauthenticated, network-based attacker to control certain, important environment variables.

Using a crafted request an attacker is able to modify

certain PHP environment variables leading to partial loss of integrity, which may allow chaining to other vulnerabilities.
This issue affects Juniper Networks Junos OS on EX Series:



* All versions prior to 20.4R3-S9;
* 21.1 versions 21.1R1 and later;
* 21.2 versions prior to 21.2R3-S7;
* 21.3 versions

prior to

21.3R3-S5;
* 21.4 versions

prior to

21.4R3-S5;
* 22.1 versions

prior to

22.1R3-S4;
* 22.2 versions

prior to

22.2R3-S2;
* 22.3 versions

prior to 22.3R3-S1;
* 22.4 versions

prior to

22.4R2-S2, 22.4R3;
* 23.2 versions prior to

23.2R1-S1, 23.2R2.

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Advisories

No advisories yet.

Fixes

Solution

The following software releases have been updated to resolve this specific issue: 20.4R3-S9*, 21.2R3-S7*, 21.3R3-S5*, 21.4R3-S5*, 22.1R3-S4*, 22.2R3-S2, 22.3R3-S1*, 22.4R2-S2*, 22.4R3*, 23.2R1-S1, 23.2R2*, 23.4R1*, and all subsequent releases. *Pending Publication


Workaround

Disable J-Web, or limit access to only trusted hosts.

History

Tue, 21 Oct 2025 23:30:00 +0000


Tue, 21 Oct 2025 20:30:00 +0000


Tue, 21 Oct 2025 19:30:00 +0000


Mon, 24 Feb 2025 15:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:o:juniper:junos:22.4:r2-s1:*:*:*:*:*:*

Thu, 13 Feb 2025 17:00:00 +0000

Type Values Removed Values Added
Description A PHP External Variable Modification vulnerability in J-Web of Juniper Networks Junos OS on EX Series allows an unauthenticated, network-based attacker to control certain, important environment variables. Using a crafted request an attacker is able to modify certain PHP environment variables leading to partial loss of integrity, which may allow chaining to other vulnerabilities. This issue affects Juniper Networks Junos OS on EX Series: * All versions prior to 20.4R3-S9; * 21.1 versions 21.1R1 and later; * 21.2 versions prior to 21.2R3-S7; * 21.3 versions prior to 21.3R3-S5; * 21.4 versions prior to 21.4R3-S5; * 22.1 versions prior to 22.1R3-S4; * 22.2 versions prior to 22.2R3-S2; * 22.3 versions prior to 22.3R3-S1; * 22.4 versions prior to 22.4R2-S2, 22.4R3; * 23.2 versions prior to 23.2R1-S1, 23.2R2. A PHP External Variable Modification vulnerability in J-Web of Juniper Networks Junos OS on EX Series allows an unauthenticated, network-based attacker to control certain, important environment variables. Using a crafted request an attacker is able to modify certain PHP environment variables leading to partial loss of integrity, which may allow chaining to other vulnerabilities. This issue affects Juniper Networks Junos OS on EX Series: * All versions prior to 20.4R3-S9; * 21.1 versions 21.1R1 and later; * 21.2 versions prior to 21.2R3-S7; * 21.3 versions prior to 21.3R3-S5; * 21.4 versions prior to 21.4R3-S5; * 22.1 versions prior to 22.1R3-S4; * 22.2 versions prior to 22.2R3-S2; * 22.3 versions prior to 22.3R3-S1; * 22.4 versions prior to 22.4R2-S2, 22.4R3; * 23.2 versions prior to 23.2R1-S1, 23.2R2.

Mon, 03 Feb 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2023-11-13'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: juniper

Published:

Updated: 2025-10-21T23:05:40.828Z

Reserved: 2023-06-27T16:17:25.277Z

Link: CVE-2023-36844

cve-icon Vulnrichment

Updated: 2024-08-02T17:01:09.911Z

cve-icon NVD

Status : Analyzed

Published: 2023-08-17T20:15:10.267

Modified: 2025-10-24T16:44:08.650

Link: CVE-2023-36844

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses