CVEvulnerability
CVE-2023-2868
CISA Known Exploited Vulnerability
Barracuda Networks ESG Appliance Improper Input Validation Vulnerability — Barracuda Networks Email Security Gateway (ESG) Appliance
Barracuda Email Security Gateway (ESG) appliance contains an improper input validation vulnerability of a user-supplied .tar file, leading to remote command injection.
- Added to KEV
- 2023-05-26
- Remediation due
- 2023-06-16
- Ransomware use
- Unknown
- Required action
- Apply updates per vendor instructions.
- Notes
- https://status.barracuda.com/incidents/34kx82j5n4q9; https://nvd.nist.gov/vuln/detail/CVE-2023-2868
- Status
- Analyzed
- Published
- 2023-05-24
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.4 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
- CVSS 3.1 ([email protected])
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-20, CWE-77
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.
Affected configurations
• barracuda email security gateway 300 firmware (>= 5.1.3.001 <= 9.2.0.006)
• barracuda email security gateway 400 firmware (>= 5.1.3.001 <= 9.2.0.006)
• barracuda email security gateway 600 firmware (>= 5.1.3.001 <= 9.2.0.006)
• barracuda email security gateway 800 firmware (>= 5.1.3.001 <= 9.2.0.006)
• barracuda email security gateway 900 firmware (>= 5.1.3.001 <= 9.2.0.006)
Related
References
- https://status.barracuda.com/incidents/34kx82j5n4q9 Vendor Advisory
- https://www.barracuda.com/company/legal/esg-vulnerability Mitigation, Vendor Advisory
- https://status.barracuda.com/incidents/34kx82j5n4q9 Vendor Advisory
- https://www.barracuda.com/company/legal/esg-vulnerability Mitigation, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-2868 US Government Resource