CVE-2023-33956 Explained : Impact and Mitigation

Kanboard is open source project management software that focuses on the Kanban methodology. Versions prior to 1.2.30 are subject to an Insecure direct object reference (IDOR) vulnerability present in the application's URL parameter. This vulnerability enables any user to read files uploaded by any other user, regardless of their privileges or restrictions. By Changing the file_id any user can render all the files where MimeType is image uploaded under /files directory regardless of uploaded by any user. This vulnerability poses a significant impact and severity to the application's security. By manipulating the URL parameter, an attacker can access sensitive files that should only be available to authorized users. This includes confidential documents or any other type of file stored within the application. The ability to read these files can lead to various detrimental consequences, such as unauthorized disclosure of sensitive information, privacy breaches, intellectual property theft, or exposure of trade secrets. Additionally, it could result in legal and regulatory implications, reputation damage, financial losses, and potential compromise of user trust. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Understanding CVE-2023-33956

Kanboard is open source project management software that is affected by an Insecure direct object reference (IDOR) vulnerability in versions prior to 1.2.30. This vulnerability allows unauthorized users to access sensitive files uploaded by others, leading to potential exposure of confidential information and other security risks.

What is CVE-2023-33956?

CVE-2023-33956 is an Insecure direct object reference (IDOR) vulnerability in Kanboard project management software. Versions earlier than 1.2.30 are impacted by this security flaw, which allows unauthorized users to view files uploaded by different users, bypassing access restrictions.

The Impact of CVE-2023-33956

The exploitation of CVE-2023-33956 can result in severe consequences for organizations using Kanboard software. Unauthorized access to sensitive files can lead to data breaches, privacy violations, intellectual property theft, and legal ramifications. The vulnerability poses a significant risk to the confidentiality and integrity of stored information.

Technical Details of CVE-2023-33956

The vulnerability in Kanboard is categorized as an exposure of sensitive information to an unauthorized actor (CWE-200). The CVSS v3.1 base score is 4.3, with a medium severity level. The attack complexity is low, requiring low privileges, and no user interaction. The attack vector is through the network with no impact on availability or integrity.

Vulnerability Description

The vulnerability arises from an insecure direct object reference in the application's URL parameter, allowing unauthorized users to access private files by manipulating the file_id.

Affected Systems and Versions

Kanboard versions prior to 1.2.30 are affected by this vulnerability, leaving them exposed to potential data breaches and unauthorized file access.

Exploitation Mechanism

Attackers can exploit this vulnerability by altering the URL parameter to access files uploaded by other users, compromising the confidentiality and security of the stored information.

Mitigation and Prevention

It is crucial for users of Kanboard to take immediate steps to mitigate the risks posed by CVE-2023-33956. Upgrading to the latest version and implementing additional security measures are essential to safeguard sensitive data and prevent unauthorized access.

Immediate Steps to Take

Users should upgrade Kanboard to version 1.2.30 or above to patch the vulnerability and prevent potential exploitation by malicious actors.

Long-Term Security Practices

Incorporating robust access controls, regular security assessments, and user awareness training can enhance the overall security posture of the application and mitigate the risk of similar vulnerabilities in the future.

Patching and Updates

Stay informed about security updates and patches released by Kanboard to address known vulnerabilities and ensure the continued protection of sensitive data.