CVE-2023-27489 : Exploit Details and Defense Strategies

This CVE involves a stored cross-site scripting vulnerability via SVG file upload in Kiwi TCMS. The vulnerability has a CVSS base score of 7.6, indicating a high severity level. The issue was published on March 29, 2023.

Understanding CVE-2023-27489

This section will delve into what CVE-2023-27489 entails, its impact, technical details, and mitigation strategies.

What is CVE-2023-27489?

Kiwi TCMS is an open-source test management system used for manual and automated testing. The vulnerability arises from the acceptance of SVG files uploaded by users, potentially containing JavaScript code. When these SVG images are viewed directly, the embedded JavaScript code may execute, leading to a cross-site scripting (XSS) attack. The fix for this vulnerability involves configuring Kiwi TCMS to serve with the Content-Security-Policy HTTP header to block inline JavaScript in modern browsers. This fix is available in version 12.1, and users are encouraged to upgrade. For those unable to upgrade, setting the Content-Security-Policy HTTP header manually is advised.

The Impact of CVE-2023-27489

The impact of this vulnerability is significant, as it allows an attacker to inject malicious scripts into the application, potentially leading to unauthorized access, data theft, and other security risks. The high CVSS base score highlights the severity of this issue, emphasizing the need for prompt action to mitigate the risk.

Technical Details of CVE-2023-27489

Let's explore the vulnerability description, affected systems and versions, as well as the exploitation mechanism in more detail.

Vulnerability Description

The vulnerability in Kiwi TCMS stems from improper neutralization of input during web page generation, specifically related to handling SVG file uploads. This oversight enables attackers to inject and execute malicious scripts within the application, posing a significant security risk to users.

Affected Systems and Versions

The affected system in this case is Kiwi TCMS, with versions prior to 12.1 being vulnerable to the stored cross-site scripting issue. Users utilizing versions older than 12.1 are at risk and should take immediate action to secure their systems.

Exploitation Mechanism

Exploiting this vulnerability involves uploading an SVG file containing malicious JavaScript code to the Kiwi TCMS platform. When the SVG image is accessed directly, the embedded JavaScript code is executed within the user's browser, enabling the attacker to launch a cross-site scripting attack.

Mitigation and Prevention

To address CVE-2023-27489 effectively, users and administrators need to take immediate steps to mitigate the risk, implement long-term security practices, and apply necessary patches and updates.

Immediate Steps to Take

Users of Kiwi TCMS should upgrade to version 12.1 or newer to eliminate the vulnerability associated with stored cross-site scripting via SVG file uploads. For users unable to upgrade immediately, manually configuring the Content-Security-Policy HTTP header to block inline JavaScript is recommended as a temporary solution.

Long-Term Security Practices

In addition to patching the vulnerability, it is crucial for organizations to prioritize security best practices such as regular security assessments, user awareness training, and proactive monitoring for potential threats. By establishing a robust security posture, organizations can reduce the likelihood of similar vulnerabilities being exploited in the future.

Patching and Updates

Regularly applying software updates, security patches, and fixes is essential in maintaining a secure environment. Kiwi TCMS users should stay informed about security advisories and promptly install updates provided by the vendor to address known vulnerabilities and enhance overall system security.