CVE-2023-2868

CVE Enrichment

CVSS: 9.8 CRITICAL
EPSS: 87.69%
EPSS Percentile: 99.76%
CISA KEV: YES — Known Exploited 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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: cve-coordination@google.com
Published: 25-May-2023 02:15
Last Modified: 17-Jun-2026 12:53
EPSS Date: 2026-10-10
CWE: CWE-20, CWE-77

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:N /
                            UI:N /
                            S:U /
                            C:H /
                            I:H /
                            A:H

CISA KEV Details

Date Added: 2023-05-26
Remediation Due: 2023-06-16
Known Ransomware Campaign 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

Affected Products / Versions

barracuda / email_security_gateway_300_firmware
Version / affected range: * · from (inclusive) 5.1.3.001 · through (inclusive) 9.2.0.006
cpe:2.3:o:barracuda:email_security_gateway_300_firmware:*:*:*:*:*:*:*:*
barracuda / email_security_gateway_400_firmware
Version / affected range: * · from (inclusive) 5.1.3.001 · through (inclusive) 9.2.0.006
cpe:2.3:o:barracuda:email_security_gateway_400_firmware:*:*:*:*:*:*:*:*
barracuda / email_security_gateway_600_firmware
Version / affected range: * · from (inclusive) 5.1.3.001 · through (inclusive) 9.2.0.006
cpe:2.3:o:barracuda:email_security_gateway_600_firmware:*:*:*:*:*:*:*:*
barracuda / email_security_gateway_800_firmware
Version / affected range: * · from (inclusive) 5.1.3.001 · through (inclusive) 9.2.0.006
cpe:2.3:o:barracuda:email_security_gateway_800_firmware:*:*:*:*:*:*:*:*
barracuda / email_security_gateway_900_firmware
Version / affected range: * · from (inclusive) 5.1.3.001 · through (inclusive) 9.2.0.006
cpe:2.3:o:barracuda:email_security_gateway_900_firmware:*:*:*:*:*:*:*:*

References

Last enrichment sync: 11-Oct-2026 12:54
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

exploiting two different vulnerabilities in Barracuda Email Security Gateway (ESG) appliances (CVE-2023-2868 and CVE-2023-7102) to deliver persistent backdoors. Linux Backdoors Masquerade as Email Security Tools on South Korean and Taiwanese Appliances

CVE (1)

Malware (3)

Threat Actors (9)

MITRE ATT&CK (3)

Vendors (2)

Products (4)

Tools (3)

Industries (1)

Countries (2)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.