SECUFOCUSNOW
Home›CVE index›CVE-2023-2868
CISA KEV · Known exploitedCritical

CVE-2023-2868

Barracuda Networks Email Security Gateway (ESG) Appliance

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 thro...

CVSS
9.8
EPSS
87.4%
99.7% percentile
CISA KEV
Listed
Published
2023.05.25
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability87.4%
Technical severityCVSS 9.8

Vulnerability overview

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 thro...

Affected product and versions

Product
Barracuda Networks Email Security Gateway (ESG) Appliance
Affected versions
5.1.3.001, >= 5.1.3.001 <= 9.2.0.006
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2023.06.16
  1. 1
    Identify

    Confirm that Barracuda Networks Email Security Gateway (ESG) Appliance and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS 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
KEV added
2023.05.26
Ransomware use
미확인