{"id":"CVE-2023-36851","state":"PUBLISHED","title":"Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload and download arbitrary files","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 or 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, 23.2R2.","publishedAt":"2023-09-26T19:53:17.080Z","updatedAt":"2025-10-21T23:05:36.801Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","source":"juniper"},"assigner":"juniper","products":["Juniper Networks Junos OS"],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","defaultStatus":"unaffected","versions":[{"version":"21.2","status":"affected","lessThan":"21.2R3-S8","versionType":"semver"},{"version":"21.4","status":"affected","lessThan":"21.4R3-S6","versionType":"semver"},{"version":"22.1","status":"affected","lessThan":"22.1R3-S5","versionType":"semver"},{"version":"22.2","status":"affected","lessThan":"22.2R3-S3","versionType":"semver"},{"version":"22.3","status":"affected","lessThan":"22.3R3-S2","versionType":"semver"},{"version":"22.4","status":"affected","lessThan":"22.4R2-S2, 22.4R3","versionType":"semver"},{"version":"23.2","status":"affected","lessThan":"23.2R1-S2, 23.2R2","versionType":"semver"}],"platforms":["SRX Series"]}],"references":["https://supportportal.juniper.net/JSA72300","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36851"],"weaknesses":["CWE-306"],"ingestedAt":"2026-10-29T20:06:08.715Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/36xxx/CVE-2023-36851.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-36851","state":"PUBLISHED","datePublished":"2023-09-26T19:53:17.080Z","dateUpdated":"2025-10-21T23:05:36.801Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2023-06-27T16:17:25.277Z"},"containers":{"cna":{"title":"Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload and download arbitrary files","descriptions":[{"lang":"en","value":"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 or 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, 23.2R2."}],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","defaultStatus":"unaffected","versions":[{"version":"21.2","status":"affected","lessThan":"21.2R3-S8","versionType":"semver"},{"version":"21.4","status":"affected","lessThan":"21.4R3-S6","versionType":"semver"},{"version":"22.1","status":"affected","lessThan":"22.1R3-S5","versionType":"semver"},{"version":"22.2","status":"affected","lessThan":"22.2R3-S3","versionType":"semver"},{"version":"22.3","status":"affected","lessThan":"22.3R3-S2","versionType":"semver"},{"version":"22.4","status":"affected","lessThan":"22.4R2-S2, 22.4R3","versionType":"semver"},{"version":"23.2","status":"affected","lessThan":"23.2R1-S2, 23.2R2","versionType":"semver"}],"platforms":["SRX Series"]}],"references":[{"url":"https://supportportal.juniper.net/JSA72300","tags":["vendor-advisory","mitigation"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","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"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-306","description":"CWE-306 Missing Authentication for Critical Function","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"juniper","orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateUpdated":"2024-01-25T22:36:32.697Z"},"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>The following minimal configuration is necessary:</p><code>&nbsp; [system services web-management http]</code><p>or</p><code>&nbsp; [system services web-management https]</code><br>"}],"value":"The following minimal configuration is necessary:\n\n  [system services web-management http]or\n\n  [system services web-management https]"}],"credits":[{"lang":"en","type":"finder","value":"The Juniper SIRT would like to acknowledge and thank watchtowr for responsibly reporting this vulnerability."}],"datePublic":"2023-09-05T19:00:00.000Z","exploits":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<span style=\"background-color: rgb(255, 255, 255);\">While Juniper SIRT is not aware of a successful exploit against a customer, a proof of concept has been published and exploit attempts have been detected.</span>\n\n<br>"}],"value":"While Juniper SIRT is not aware of a successful exploit against a customer, a proof of concept has been published and exploit attempts have been detected."}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"The following software releases have been updated to resolve this specific issue:&nbsp;<span style=\"background-color: rgb(255, 255, 255);\">21.2R3-S8*, <span style=\"background-color: rgb(255, 255, 255);\">21.4R3-S6*, <span style=\"background-color: rgb(255, 255, 255);\">22.1R3-S5*</span>, <span style=\"background-color: rgb(255, 255, 255);\">22.2R3-S3*, <span style=\"background-color: rgb(255, 255, 255);\">22.3R3-S2*, </span></span></span></span><span style=\"background-color: rgb(255, 255, 255);\">22.4R2-S2, </span><span style=\"background-color: rgb(255, 255, 255);\">22.4R3*, </span><span style=\"background-color: rgb(255, 255, 255);\">23.2R1-S2, </span><span style=\"background-color: rgb(255, 255, 255);\">23.2R2*, </span><span style=\"background-color: rgb(255, 255, 255);\">23.4R1</span><span style=\"background-color: rgb(255, 255, 255);\"><span style=\"background-color: rgb(255, 255, 255);\">,</span></span>&nbsp;and all subsequent releases.<br>*Pending Publication<br>"}],"value":"The following software releases have been updated to resolve this specific issue: 21.2R3-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, and all subsequent releases.\n*Pending Publication"}],"source":{"advisory":"JSA72300","defect":["1758332"],"discovery":"EXTERNAL"},"timeline":[{"lang":"en","time":"2023-09-05T19:00:00.000Z","value":"Initial CVE publication"},{"lang":"en","time":"2023-11-08T17:00:00.000Z","value":"Juniper SIRT is now aware of successful exploitation"}],"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"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://supportportal.juniper.net/JSA72300","tags":["vendor-advisory","mitigation","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T17:01:09.845Z"}},{"title":"CISA ADP Vulnrichment","references":[{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36851","tags":["government-resource"]}],"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2023-36851","role":"CISA Coordinator","options":[{"Exploitation":"active"},{"Automatable":"yes"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2023-11-15T16:40:42.428099Z"}}},{"other":{"type":"kev","content":{"dateAdded":"2023-11-13","reference":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36851"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-21T23:05:36.801Z"},"timeline":[{"time":"2023-11-13T00:00:00.000Z","lang":"en","value":"CVE-2023-36851 added to CISA KEV"}]}]}}}