CVE-2021-33894: High Vulnerability in Progress MOVEit Transfer

In Progress MOVEit Transfer before 2019.0.6 (11.0.6), 2019.1.x before 2019.1.5 (11.1.5), 2019.2.x before 2019.2.2 (11.2.2), 2020.x before 2020.0.5 (12.0.5), 2020.1.x before 2020.1.4 (12.1.4), and 2021.x before 2021.0.1 (13.0.1), a SQL injection vulnerability exists in SILUtility.vb in MOVEit.DMZ.WebApp in the MOVEit Transfer web app. This vulnerability allows an authenticated attacker to gain unauthorized access to the database.

Depending on the database engine being used (MySQL, Microsoft SQL Server, or Azure SQL), attackers may be able to infer information about the structure and contents of the database or execute SQL statements that alter or delete database elements. With a CVSS score of 8.8, this high-severity vulnerability poses significant risks to organizations that utilize the affected software.

Organizations should prioritize patching immediately to mitigate this risk. The vulnerability has been classified under CWE-89, which indicates a weakness related to SQL injection. The potential impact on confidentiality, integrity, and availability is high, thereby necessitating swift action.

Monitoring for any signs of exploitation is also crucial, as SQL injection vulnerabilities can lead to severe data breaches and operational disruptions.

Vulnerability Details

The vulnerability is specifically located in the SILUtility.vb file within the MOVEit Transfer application, which is used for secure managed file transfers. The SQL injection flaw can be exploited by authenticated users to manipulate database queries, potentially leading to unauthorized data access.

The CVSS score of 8.8 categorizes this vulnerability as high severity, indicating a critical need for organizations to address it in their patch management processes. The vulnerability was first published on June 9, 2021, and is notable for its potential to compromise sensitive information.

Technical Analysis

The root cause of this vulnerability stems from improper input validation, which allows attackers to inject malicious SQL code through user inputs. The attack vector is categorized as network-based, meaning that an exploit could be executed remotely without physical access to the affected system.

The attack complexity is low, requiring minimal effort from the attacker. Privileges required to exploit this vulnerability are also low, meaning authenticated users can initiate attacks without elevated permissions. Importantly, no user interaction is needed for exploitation, which further increases the risk.

The impact of successful exploitation includes high confidentiality, integrity, and availability impacts, allowing attackers to potentially disclose sensitive information, alter or delete data, and disrupt service availability.

Risk & Impact Analysis

Risk to organizations includes unauthorized access to sensitive data, potential data loss, and significant reputational damage. The blast radius for this vulnerability is substantial, as it affects multiple versions of the MOVEit Transfer application, which may be deployed across various environments.

Given the high CVSS score and the potential for exploitation, organizations should assess their exposure to this vulnerability, particularly if they are running affected versions of MOVEit Transfer. The urgency for remediation is critical, as attackers may prioritize exploiting known vulnerabilities.

Monitoring systems for signs of exploitation and applying the necessary patches should be a priority in the organization's security program.

Exploitation Status

Affected Versions

The following versions of Progress MOVEit Transfer are affected by this vulnerability: any version before 2019.0.6, 2019.1.x before 2019.1.5, 2019.2.x before 2019.2.2, 2020.x before 2020.0.5, 2020.1.x before 2020.1.4, and 2021.x before 2021.0.1.

Mitigation & Remediation

Organizations should implement the following remediation strategies to address this vulnerability: applying the latest patches provided by Progress for MOVEit Transfer, specifically upgrading to versions 2019.0.6, 2019.1.5, 2019.2.2, 2020.0.5, 2020.1.4, or 2021.0.1 or later.

In cases where an immediate patch is not available, organizations should consider implementing network controls to restrict access to the MOVEit Transfer application and monitor for any suspicious activity that may indicate an attempted exploitation of this vulnerability.

For further guidance, organizations can refer to resources such as the penetration testing services to assess their security posture.

Detection Guidance

To detect potential exploitation attempts related to this vulnerability, organizations should monitor logs for unusual database queries, particularly those that include unexpected SQL syntax or parameters. Behavioral anomalies from authenticated users accessing sensitive data should also raise alerts.

Network signatures for known SQL injection patterns could be deployed to enhance detection capabilities. Additionally, any changes to database schemas or unexpected data modifications should be closely investigated.

AppSecure Threat Intelligence Insight

The long-term significance of CVE-2021-33894 lies in its demonstration of how SQL injection vulnerabilities can persist in widely used applications, especially in file transfer systems. This highlights the necessity for rigorous code reviews and security assessments during development.

Security teams should take this incident as a learning opportunity to enhance their vulnerability management programs and ensure thorough testing for similar flaws in their applications.

For organizations looking to strengthen their defenses against such vulnerabilities, engaging in regular vulnerability management program assessments is essential.

Furthermore, adopting a proactive approach through continuous security assessments, such as penetration testing methodology, can help identify and remediate vulnerabilities before they can be exploited.

By prioritizing security in software development and operational practices, organizations can reduce their risk exposure and better safeguard their assets against evolving threats.