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attacker to upload and download arbitrary files","workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Disable J-Web, or limit access to only trusted hosts.<br>"}],"value":"Disable J-Web, or limit access to only trusted hosts."}],"x_generator":{"engine":"Vulnogram 0.1.0-dev"}}},"cveMetadata":{"assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","assignerShortName":"juniper","cveId":"CVE-2023-36851","datePublished":"2023-09-26T19:53:17.080Z","dateReserved":"2023-06-27T16:17:25.277Z","dateUpdated":"2025-10-21T23:05:36.801Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"},"cna_checked":1794241201,"cve":"CVE-2023-36851","description":"A Missing Authentication for Critical Function vulnerability in Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity.\n\n\n\nWith a specific request to \n\nwebauth_operation.php\n\nthat doesn't require authentication, an attacker is able to upload and download arbitrary files via J-Web, leading to a loss of \n\nintegrity\u00a0or confidentiality, which may allow chaining to other vulnerabilities.\n\n\nThis issue affects Juniper Networks Junos OS on SRX Series:\n\n\n\n  *  \n\n21.2 versions prior to 21.2R3-S8;\n  *  21.4 \n\nversions prior to \n\n21.4R3-S6;\n  *  22.1 \n\nversions prior to \n\n22.1R3-S5;\n  *  22.2 \n\nversions prior to \n\n22.2R3-S3;\n  *  22.3 \n\nversions prior to \n\n22.3R3-S2;\n  *  22.4 versions prior to 22,4R2-S2, 22.4R3;\n  *  23.2 versions prior to \n\n23.2R1-S2,\u00a023.2R2.","epss":{"date":"2026-11-12","epss":0.01123,"percentile":0.667},"epss_checked":1794522003,"first_seen":1793665375,"kev":{"cveID":"CVE-2023-36851","cwes":["CWE-306"],"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-2023-36851","product":"Junos OS","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","shortDescription":"Juniper Junos OS on SRX Series contains a missing authentication for critical function vulnerability that allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity. With a specific request to webauth_operation.php that doesn't require authentication, an attacker is able to upload arbitrary files via J-Web, leading to a loss of integrity for a certain part of the file system, which may allow chaining to other vulnerabilities.","vendorProject":"Juniper","vulnerabilityName":"Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability"},"kev_checked":1794522003,"products":"Juniper Networks Junos OS","references":["https://supportportal.juniper.net/JSA72300","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36851"],"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:\u00a021.2R3-S8*, 21.4R3-S6*, 22.1R3-S5*, 22.2R3-S3*, 22.3R3-S2*, 22.4R2-S2, 22.4R3*, 23.2R1-S2, 23.2R2*, 23.4R1,\u00a0and all subsequent releases.\n*Pending Publication","state":"PUBLISHED","title":"Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload and download arbitrary files","updated_at":1794500401,"workarounds":"Disable J-Web, or limit access to only trusted hosts."},"sources":[]}
