CVEvulnerability

CVE-2023-2868

9.8 CRITICAL Known exploited Published 2023-05-24 Modified 2026-06-17 Official page ↗

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

Weakness · CWE (2)

  • CWE-20 Improper Input Validation weakness
  • CWE-77 Improper Neutralization of Special Elements used in a Command weakness

References