{"cve":{"cve_id":"CVE-2023-2868","is_kev":true,"kev_date_added":"2023-05-26","kev_vendor_project":"Barracuda Networks","kev_product":"Email Security Gateway (ESG) Appliance","kev_vulnerability_name":"Barracuda Networks ESG Appliance Improper Input Validation Vulnerability","kev_short_description":"Barracuda Email Security Gateway (ESG) appliance contains an improper input validation vulnerability of a user-supplied .tar file, leading to remote command injection.","kev_required_action":"Apply updates per vendor instructions.","kev_due_date":"2023-06-16","kev_known_ransomware":false,"kev_notes":"https://status.barracuda.com/incidents/34kx82j5n4q9;  https://nvd.nist.gov/vuln/detail/CVE-2023-2868","kev_cwes":["CWE-20"],"epss_score":0.86956,"epss_percentile":0.9972,"epss_as_of":"2026-06-23","description":"A remote command injection vulnerability exists in the Barracuda Email Security Gateway (appliance form factor only) product effecting versions 5.1.3.001-9.2.0.006. The vulnerability arises out of a failure to comprehensively sanitize the processing of .tar file (tape archives). The vulnerability stems from incomplete input validation of a user-supplied .tar file as it pertains to the names of the files contained within the archive. As a consequence, a remote attacker can specifically format these file names in a particular manner that will result in remotely executing a system command through Perl's qx operator with the privileges of the Email Security Gateway product. This issue was fixed as part of BNSF-36456 patch. This patch was automatically applied to all customer appliances.","published_at":"2023-05-24T18:00:52.360000Z","last_modified_at":null,"cvss_v3_score":9.4,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L","cvss_v3_severity":"CRITICAL","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"active","ssvc_automatable":true,"ssvc_technical_impact":"total","cwes":["CWE-20"],"nvd_references":["https://www.barracuda.com/company/legal/esg-vulnerability","https://status.barracuda.com/incidents/34kx82j5n4q9"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:31.350578Z","updated_at":"2026-06-29T01:30:03.723887Z"},"effective_severity":"CRITICAL","badges":["kev","epss"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"L","value_label":"Low"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"barracuda","vendor_name":"Barracuda","product_slug":"barracuda-email-security-gateway","product_name":"Barracuda Email Security Gateway","version_start":"5.1.3.001","version_start_inclusive":true,"version_end":"9.2.0.006","version_end_inclusive":false,"cpe23_uri":"cve5:barracuda:barracuda-email-security-gateway:5.1.3.001:9.2.0.006"}],"exploit_refs":[],"news":[],"references":[{"url":"https://www.barracuda.com/company/legal/esg-vulnerability","source_type":"MISC","tags":[]},{"url":"https://status.barracuda.com/incidents/34kx82j5n4q9","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2023-05-24T18:00:52.360000Z","label":"CVE published","source":null},{"type":"cisa_reported","at":"2023-05-26T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"cvss_changed","at":"2026-06-28T17:28:01.329564Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:28:01.329564Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:28:01.329564Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T01:30:03.723887Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:30:03.723887Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:30:03.723887Z","label":"SSVC decision revised","source":"vulnrichment"}]}