{"cveID":"CVE-2023-36851","vendorProject":"Juniper","product":"Junos OS","vulnerabilityName":"Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability","dateAdded":"2023-11-13","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.","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","dueDate":"2023-11-17","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","cwes":["CWE-306"],"year":2023,"state":"mapped","stale_reasons":[],"mappings":[{"domain":"enterprise","cve":"CVE-2023-36851","technique":"T1190","technique_name_at_mapping":"Exploit Public-Facing Application","mapping_type":"exploitation_technique","capability_group":"auth_missing","comments":"This vulnerability is exploited through a Missing Authentication for Critical Function weakness in Juniper Networks Junos OS on SRX Series devices. Attackers leverage this vulnerability to impact file system integrity by sending a crafted request to the `webauth_operation.php` endpoint, which does not require authentication. This manipulation allows attackers to cause limited impact to the file system integrity, potentially enabling further exploitation.","references":["https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.cybersecuritydive.com/news/5-juniper-cves-exploited/699813/&ved=2ahUKEwjztJ6cq-6JAxXnEVkFHRZXIeUQxfQBKAB6BAgLEAE&usg=AOvVaw0yLNfRerjcSUGMt-VpnEKd","https://securityaffairs.com/154128/security/cisa-juniper-flaws-known-exploited-vulnerabilities-catalog.html"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"},{"domain":"enterprise","cve":"CVE-2023-36851","technique":"T1059","technique_name_at_mapping":"Command and Scripting Interpreter","mapping_type":"primary_impact","capability_group":"auth_missing","comments":"This vulnerability is exploited through a Missing Authentication for Critical Function weakness in Juniper Networks Junos OS on SRX Series devices. Attackers leverage this vulnerability to impact file system integrity by sending a crafted request to the `webauth_operation.php` endpoint, which does not require authentication. This manipulation allows attackers to cause limited impact to the file system integrity, potentially enabling further exploitation.","references":["https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.cybersecuritydive.com/news/5-juniper-cves-exploited/699813/&ved=2ahUKEwjztJ6cq-6JAxXnEVkFHRZXIeUQxfQBKAB6BAgLEAE&usg=AOvVaw0yLNfRerjcSUGMt-VpnEKd","https://securityaffairs.com/154128/security/cisa-juniper-flaws-known-exploited-vulnerabilities-catalog.html"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"}],"techniques":[{"id":"T1059","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Command and Scripting Interpreter","name_at_mapping":"Command and Scripting Interpreter","renamed":false,"revoked_by":null,"mapping_types":["primary_impact"],"sigma_rule_count":95,"has_detection_strategy":true},{"id":"T1190","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Exploit Public-Facing Application","name_at_mapping":"Exploit Public-Facing Application","renamed":false,"revoked_by":null,"mapping_types":["exploitation_technique"],"sigma_rule_count":149,"has_detection_strategy":true}],"mapping_types":["exploitation_technique","primary_impact"],"has_exploitation_technique":true,"mapping_attack_versions":["16.1"],"mapping_domains":["enterprise"],"sigma_coverage":"full","sigma_rules_tagged_cve":[],"added_after_mapping_snapshot":false,"_source":"kevmap","_built":"2026-08-23 05:47 UTC","_attack_version":"19.2"}