{"id":"CVE-2023-2868","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-2868","generatedAt":"2026-10-31T11:46:50.360Z","title":"Barracuda Networks ESG Appliance Improper Input Validation Vulnerability","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":"2023-05-24T19:15:09.000Z","lastModified":"2026-06-17T05:53:40.000Z","status":"Analyzed","sourceIdentifier":"cve-coordination@google.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-20","CWE-77"],"affected":["barracuda/email security gateway 300 firmware","barracuda/email security gateway 400 firmware","barracuda/email security gateway 600 firmware","barracuda/email security gateway 800 firmware","barracuda/email security gateway 900 firmware"],"epss":{"score":0.86841,"percentile":0.99744,"date":"2026-10-30","history":[]},"kev":{"listed":true,"dateAdded":"2023-05-26","dueDate":"2023-06-16","knownRansomwareCampaignUse":"Unknown","notes":"Apply updates per vendor instructions.\nhttps://status.barracuda.com/incidents/34kx82j5n4q9;  https://nvd.nist.gov/vuln/detail/CVE-2023-2868"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 16 June 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"https://status.barracuda.com/incidents/34kx82j5n4q9","tags":["Vendor Advisory"],"source":"cve-coordination@google.com"},{"url":"https://www.barracuda.com/company/legal/esg-vulnerability","tags":["Mitigation","Vendor Advisory"],"source":"cve-coordination@google.com"},{"url":"https://status.barracuda.com/incidents/34kx82j5n4q9","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.barracuda.com/company/legal/esg-vulnerability","tags":["Mitigation","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-2868","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-2868","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}