{"cveID":"CVE-2023-2868","vendorProject":"Barracuda Networks","product":"Email Security Gateway (ESG) Appliance","vulnerabilityName":"Barracuda Networks ESG Appliance Improper Input Validation Vulnerability","dateAdded":"2023-05-26","shortDescription":"Barracuda Email Security Gateway (ESG) appliance contains an improper input validation vulnerability of a user-supplied .tar file, leading to remote command injection.","requiredAction":"Apply updates per vendor instructions.","dueDate":"2023-06-16","knownRansomwareCampaignUse":"Unknown","notes":"https://status.barracuda.com/incidents/34kx82j5n4q9;  https://nvd.nist.gov/vuln/detail/CVE-2023-2868","cwes":["CWE-20"],"year":2023,"state":"mapped","stale_reasons":[],"mappings":[{"domain":"enterprise","cve":"CVE-2023-2868","technique":"T1566.001","technique_name_at_mapping":"Spearphishing Attachment","mapping_type":"exploitation_technique","capability_group":"input_validation","comments":"CVE-2023-2868 in the Barracuda Email Security Gateway (ESG) had been reportedly exploited for espionage and exfiltration efforts by UNC4841 attributed by Mandiant. Following the exploitation of CVE-2023-2868, malware SALTWATER, SEASPY, and SEASIDE were identified to be used in intrusions.","references":["https://www.bleepingcomputer.com/news/security/barracuda-esg-zero-day-attacks-linked-to-suspected-chinese-hackers/","https://www.securityweek.com/chinese-hackers-deliver-malware-to-barracuda-email-security-appliances-via-new-zero-day/","https://cloud.google.com/blog/topics/threat-intelligence/barracuda-esg-exploited-globally/"],"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-2023-2868","technique":"T1041","technique_name_at_mapping":"Exfiltration Over C2 Channel","mapping_type":"secondary_impact","capability_group":"input_validation","comments":"CVE-2023-2868 in the Barracuda Email Security Gateway (ESG) had been reportedly exploited for espionage and exfiltration efforts by UNC4841 attributed by Mandiant. Following the exploitation of CVE-2023-2868, malware SALTWATER, SEASPY, and SEASIDE were identified to be used in intrusions.","references":["https://www.bleepingcomputer.com/news/security/barracuda-esg-zero-day-attacks-linked-to-suspected-chinese-hackers/","https://www.securityweek.com/chinese-hackers-deliver-malware-to-barracuda-email-security-appliances-via-new-zero-day/","https://cloud.google.com/blog/topics/threat-intelligence/barracuda-esg-exploited-globally/"],"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-2023-2868","technique":"T1059","technique_name_at_mapping":"Command and Scripting Interpreter","mapping_type":"primary_impact","capability_group":"input_validation","comments":"CVE-2023-2868 in the Barracuda Email Security Gateway (ESG) had been reportedly exploited for espionage and exfiltration efforts by UNC4841 attributed by Mandiant. Following the exploitation of CVE-2023-2868, malware SALTWATER, SEASPY, and SEASIDE were identified to be used in intrusions.","references":["https://www.bleepingcomputer.com/news/security/barracuda-esg-zero-day-attacks-linked-to-suspected-chinese-hackers/","https://www.securityweek.com/chinese-hackers-deliver-malware-to-barracuda-email-security-appliances-via-new-zero-day/","https://cloud.google.com/blog/topics/threat-intelligence/barracuda-esg-exploited-globally/"],"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-2023-2868","technique":"T1105","technique_name_at_mapping":"Ingress Tool Transfer","mapping_type":"secondary_impact","capability_group":"input_validation","comments":"CVE-2023-2868 in the Barracuda Email Security Gateway (ESG) had been reportedly exploited for espionage and exfiltration efforts by UNC4841 attributed by Mandiant. Following the exploitation of CVE-2023-2868, malware SALTWATER, SEASPY, and SEASIDE were identified to be used in intrusions.","references":["https://www.bleepingcomputer.com/news/security/barracuda-esg-zero-day-attacks-linked-to-suspected-chinese-hackers/","https://www.securityweek.com/chinese-hackers-deliver-malware-to-barracuda-email-security-appliances-via-new-zero-day/","https://cloud.google.com/blog/topics/threat-intelligence/barracuda-esg-exploited-globally/"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"}],"techniques":[{"id":"T1041","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Exfiltration Over C2 Channel","name_at_mapping":"Exfiltration Over C2 Channel","renamed":false,"revoked_by":null,"mapping_types":["secondary_impact"],"sigma_rule_count":5,"has_detection_strategy":true},{"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":"T1105","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Ingress Tool Transfer","name_at_mapping":"Ingress Tool Transfer","renamed":false,"revoked_by":null,"mapping_types":["secondary_impact"],"sigma_rule_count":87,"has_detection_strategy":true},{"id":"T1566.001","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Spearphishing Attachment","name_at_mapping":"Spearphishing Attachment","renamed":false,"revoked_by":null,"mapping_types":["exploitation_technique"],"sigma_rule_count":24,"has_detection_strategy":true}],"mapping_types":["exploitation_technique","primary_impact","secondary_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"}