CVE-2023-2868 : Security Advisory and Response

This CVE-2023-2868 was assigned by Google and published on May 24, 2023. It involves a remote command injection vulnerability in the Barracuda Email Security Gateway product, affecting versions 5.1.3.001 to 9.2.0.006.

Understanding CVE-2023-2868

This section delves into the details of the remote code injection vulnerability present in the Barracuda Email Security Gateway.

What is CVE-2023-2868?

CVE-2023-2868 is a remote command injection vulnerability found in the Barracuda Email Security Gateway product. It arises due to inadequate input validation of a user-supplied .tar file, allowing a remote attacker to execute system commands through Perl's qx operator with the privileges of the Email Security Gateway product.

The Impact of CVE-2023-2868

The impact of this vulnerability is critical, with a CVSS base score of 9.4 out of 10. The confidentiality and integrity impacts are high, while the availability impact is low. The vulnerability falls under CAPEC-253, known as Remote Code Inclusion.

Technical Details of CVE-2023-2868

In this section, the technical aspects of the CVE-2023-2868 vulnerability are discussed.

Vulnerability Description

The vulnerability stems from a failure to properly sanitize the processing of .tar files within the Barracuda Email Security Gateway, enabling remote command injection.

Affected Systems and Versions

The Barracuda Email Security Gateway, specifically in appliance form factor, is impacted by this vulnerability, affecting versions 5.1.3.001 to 9.2.0.006.

Exploitation Mechanism

By formatting file names within a user-supplied .tar file in a specific manner, a remote attacker can exploit this vulnerability to execute system commands.

Mitigation and Prevention

Mitigating the risks associated with CVE-2023-2868 requires immediate action and long-term security practices.

Immediate Steps to Take

Users are advised to apply the BNSF-36456 patch, which addresses the vulnerability. This patch has been automatically applied to all customer appliances.

Long-Term Security Practices

Implementing robust input validation mechanisms and regularly updating security patches can enhance the overall security posture of the Barracuda Email Security Gateway.

Patching and Updates

Staying vigilant about security updates and promptly applying patches provided by Barracuda can help prevent exploitation of vulnerabilities like CVE-2023-2868.