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Known exploited vulnerability

CVE-2023-2868

criticalCVSS 3.1 9.8In CISA KEVEPSS 87%Published · Barracuda

The short answer

CVE-2023-2868 affects Barracuda Barracuda Email Security Gateway and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-05-26: attackers are using it, so patch it first.

What it is

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.

Weakness: CWE-20, CWE-77.

Severity

9.8 critical

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

Exploited (CISA KEV)

Yes, since May 26, 2023

Federal due date Jun 16, 2023

EPSS, next 30 days

87%

Higher than 100% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

Apply updates per vendor instructions.

Affected products

Barracuda Email Security Gateway. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2023-2868 being exploited?

Yes. CISA added CVE-2023-2868 to its Known Exploited Vulnerabilities catalog on 2023-05-26, with a federal remediation due date of 2023-06-16.

How do I fix CVE-2023-2868?

CISA's required action: Apply updates per vendor instructions.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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