CVE-2023-27470 : What You Need to Know

This CVE-2023-27470 involves a vulnerability in BASupSrvcUpdater.exe within the N-able Take Control Agent up to version 7.0.41.1141. The vulnerability, rated moderate, allows for a Time-of-Check Time-of-Use (TOCTOU) Race Condition via a pseudo-symlink in a specific directory, potentially resulting in arbitrary file deletion.

Understanding CVE-2023-27470

This section will delve into the specifics of CVE-2023-27470, highlighting its impact, technical details, and mitigation strategies.

What is CVE-2023-27470?

The CVE-2023-27470 vulnerability is present in BASupSrvcUpdater.exe in N-able Take Control Agent up to version 7.0.41.1141. Exploiting this vulnerability involves manipulating a pseudo-symlink in a particular directory, potentially leading to unauthorized file deletions.

The Impact of CVE-2023-27470

The impact of this vulnerability can result in arbitrary file deletions, posing a risk to the confidentiality, integrity, and availability of sensitive data stored on the affected system.

Technical Details of CVE-2023-27470

To fully understand CVE-2023-27470, it is important to explore the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in BASupSrvcUpdater.exe allows for a TOCTOU Race Condition through a pseudo-symlink at %PROGRAMDATA%\GetSupportService_N-Central\PushUpdates. This could be exploited by an attacker to delete arbitrary files.

Affected Systems and Versions

Currently, the N-able Take Control Agent versions up to 7.0.41.1141 are confirmed to be affected by this vulnerability. It is crucial for users of these versions to take immediate action to mitigate the risk.

Exploitation Mechanism

Exploiting CVE-2023-27470 involves leveraging the TOCTOU Race Condition in BASupSrvcUpdater.exe via a pseudo-symlink within the specified directory. Attackers could potentially abuse this vulnerability to delete important files on the system.

Mitigation and Prevention

Effective mitigation strategies are essential to safeguard systems against CVE-2023-27470. Here are key steps that can be taken to address this vulnerability.

Immediate Steps to Take

Users are strongly advised to update their N-able Take Control Agent to version 7.0.43 or later to mitigate the vulnerability.
Implement file integrity monitoring and access controls to detect and prevent unauthorized file deletions.
Monitor system logs for any suspicious activities related to file deletion.

Long-Term Security Practices

Regularly update and patch software to ensure that known vulnerabilities are addressed promptly.
Conduct regular security assessments and penetration testing to identify and remediate potential security weaknesses.
Educate users on best practices for system security and vigilance against social engineering attacks.

Patching and Updates

It is recommended that all users of N-able Take Control Agent, particularly versions up to 7.0.41.1141, apply the latest patch provided by the vendor to eliminate the vulnerability and enhance the overall security posture of their systems.