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vulnerability in J-Web of Juniper Networks Junos OS on EX Series allows an unauthenticated, network-based attacker to control certain, important environment variables.\n\nUsing a crafted request an attacker is able to modify \n\ncertain PHP environment variables\u00a0leading to partial loss of integrity,\u00a0which may allow chaining to other vulnerabilities.\nThis issue affects Juniper Networks Junos OS on EX Series:\n\n\n\n  *  All versions prior to 20.4R3-S9;\n  *  21.1 versions 21.1R1 and later;\n  *  21.2 versions prior to 21.2R3-S7;\n  *  21.3 versions \n\nprior to \n\n 21.3R3-S5;\n  *  21.4 versions \n\nprior to \n\n21.4R3-S5;\n  *  22.1 versions \n\nprior to \n\n22.1R3-S4;\n  *  22.2 versions \n\nprior to \n\n22.2R3-S2;\n  *  22.3 versions \n\nprior to 22.3R3-S1;\n  *  22.4 versions \n\nprior to \n\n22.4R2-S2, 22.4R3;\n  *  23.2 versions prior to \n\n23.2R1-S1, 23.2R2.","epss":{"date":"2026-11-12","epss":0.89958,"percentile":0.99797},"epss_checked":1794522003,"first_seen":1793665375,"kev":{"cveID":"CVE-2023-36844","cwes":["CWE-473"],"dateAdded":"2023-11-13","dueDate":"2023-11-17","forensicTriage":"No","knownRansomwareCampaignUse":"Unknown","notes":"https://supportportal.juniper.net/s/article/2023-08-Out-of-Cycle-Security-Bulletin-Junos-OS-SRX-Series-and-EX-Series-Multiple-vulnerabilities-in-J-Web-can-be-combined-to-allow-a-preAuth-Remote-Code-Execution?language=en_US ;  https://nvd.nist.gov/vuln/detail/CVE-2023-36844","product":"Junos OS","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","shortDescription":"Juniper Junos OS on EX Series contains a PHP external variable modification vulnerability that 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.","vendorProject":"Juniper","vulnerabilityName":"Juniper Junos OS EX Series PHP External Variable Modification Vulnerability"},"kev_checked":1794522003,"products":"Juniper Networks Junos OS","references":["https://supportportal.juniper.net/JSA72300","http://packetstormsecurity.com/files/174865/Juniper-SRX-Firewall-EX-Switch-Remote-Code-Execution.html","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36844"],"score":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","provider":"juniper","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"solutions":"The following software releases have been updated to resolve this specific issue: \n\n20.4R3-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.\n\n\n*Pending Publication","state":"PUBLISHED","title":"Junos OS: EX Series: A PHP vulnerability in J-Web allows an unauthenticated attacker to control important environment variables","updated_at":1794500401,"workarounds":"Disable J-Web, or limit access to only trusted hosts."},"sources":[]}