Live › vulnerability › CVE-2023-36844
Go to dashboardJuniper Junos OS on EX Series switches runs a PHP component that accepts crafted requests which overwrite certain PHP environment variables. An unauthenticated remote attacker can use this to partially compromise integrity and possibly chain it into further flaws.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Juniper Junos OS | vendor | – | – |
| juniper junos | vendor | < 20.4 | 20.4 |
| juniper junos | vendor | = 20.4 | – |
| juniper junos | vendor | = 21.1 | – |
| juniper junos | vendor | = 21.2 | – |
| juniper junos | vendor | = 21.3 | – |
| juniper junos | vendor | = 21.4 | – |
| juniper junos | vendor | = 22.1 | – |
| juniper junos | vendor | = 22.2 | – |
| juniper junos | vendor | = 22.3 | – |
| juniper junos | vendor | = 22.4 | – |
| juniper junos | vendor | = 23.2 | – |
Unknown from the sources.
Apply the mitigation or fixed Junos OS release from Juniper's advisory for CVE-2023-36844; CISA says to discontinue use of the product if no mitigation is available.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
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:
prior to
21.3R3-S5;
prior to
21.4R3-S5;
prior to
22.1R3-S4;
prior to
22.2R3-S2;
prior to 22.3R3-S1;
prior to
22.4R2-S2, 22.4R3;
23.2R1-S1, 23.2R2.
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