CVE-2023-2868 — Barracuda Networks ESG Appliance Improper Input Validation Vulnerability

Overview

Barracuda Email Security Gateway (ESG) appliance contains an improper input validation vulnerability of a user-supplied .tar file, leading to remote command injection.

Vulnerability details

CVE ID

CVE-2023-2868

Vulnerability

Barracuda Networks ESG Appliance Improper Input Validation Vulnerability

Vendor

Barracuda Networks

Affected products

Barracuda Networks: Email Security Gateway (ESG) Appliance

Severity

HIGH

Exploitation status

Actively exploited in the wild (CISA KEV)

Published

2023-05-26

Remediation guidance

CVE-2023-2868 is in CISA's Known Exploited Vulnerabilities (KEV) catalog — U.S. federal civilian agencies are required to remediate it under Binding Operational Directive 22-01. Treat it as a priority for every environment.

Apply the vendor's official security update for Barracuda Networks the affected product as soon as possible. Where a patch is unavailable, apply vendor mitigations or isolate/segment exposed systems.

Hunt for indicators of compromise tied to this vulnerability and confirm logging/EDR coverage on affected assets.

Authoritative references

• NVD — National Vulnerability Database
• MITRE CVE Record
• CISA Known Exploited Vulnerabilities Catalog
• FIRST EPSS — Exploit Prediction Scoring