CVE-2023-36844Junos OS: EX Series: A PHP vulnerability in J-Web allows an unauthenticated attacker to control important environment variables
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.
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 5.3 | MEDIUM | 3.1juniper (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
CISA required action
⚡ Known exploited · remediation due Nov 17, 2023
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Details
- CVE ID
- CVE-2023-36844
- Status
- Analyzed
- Assigner (CNA)
- juniper
- Published
- Aug 17, 2023
- Last modified
- 2026-06-17 06:07 UTC
- Weaknesses
- CWE-473 · PHP External Variable Modification
Affected Products
As published by the CNA in the CVE record.
Juniper NetworksJunos OS10 version ranges
- before 20.4R3-S9
- 21.1 before 21.1*
- 21.2 before 21.2R3-S6
- 21.3 before 21.3R3-S5
- 21.4 before 21.4R3-S5
- 22.1 before 22.1R3-S4
- 22.2 before 22.2R3-S2
- 22.3 before 22.3R3-S1
- 22.4 before 22.4R2-S2, 22.4R3
- 23.2 before 23.2R1-S1, 23.2R2