EUVD-2024-53176

Comprehensive Technical Analysis of EUVD-2024-53176

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2024-53176 affects DataEase, an open-source data visualization analysis tool. The flaw resides in the authentication mechanism within the io.dataease.auth.filter.TokenFilter class, specifically in how it handles URL requests for authentication bypass. The WhitelistUtils.match method, which filters semicolons, is insufficient to prevent unauthorized access when the server.servlet.context-path is set during deployment. This vulnerability allows attackers to bypass authentication by exploiting whitelist prefixes like /geo/../context-path/.

Severity Evaluation:

• Base Score: 9.3 (CVSS 4.0)
• Vector String: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

The high base score indicates a critical vulnerability due to the ease of exploitation (low complexity) and the significant impact on confidentiality, integrity, and availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

1. Unauthorized Access: Attackers can exploit the vulnerability to gain unauthorized access to the DataEase application.
2. Data Exfiltration: Once authenticated, attackers can potentially exfiltrate sensitive data.
3. Privilege Escalation: Attackers may use the unauthorized access to escalate privileges within the application.

Exploitation Methods:

1. URL Manipulation: Attackers can craft specific URLs that bypass the authentication mechanism by exploiting the whitelist prefixes.
2. Context Path Manipulation: By setting the server.servlet.context-path, attackers can manipulate the request URI to bypass authentication.

3. Affected Systems and Software Versions

Affected Software:

• DataEase versions prior to 2.10.4

Affected Systems:

• Any system running the vulnerable versions of DataEase, particularly those with custom server.servlet.context-path settings.

4. Recommended Mitigation Strategies

1. Upgrade to the Latest Version: Immediately upgrade to DataEase version 2.10.4 or later, which includes the fix for this vulnerability.
2. Network Segmentation: Implement network segmentation to limit the exposure of the DataEase application.
3. Access Controls: Enforce strict access controls and monitor for unusual access patterns.
4. Regular Audits: Conduct regular security audits and vulnerability assessments.
5. Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious activities.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations using DataEase, particularly those in sectors handling sensitive data such as healthcare, finance, and government. Unauthorized access can lead to data breaches, financial loss, and reputational damage. The high severity score underscores the need for immediate attention and mitigation to prevent potential large-scale cyber incidents within the European Union.

6. Technical Details for Security Professionals

Vulnerability Details:

• Class: io.dataease.auth.filter.TokenFilter
• Method: WhitelistUtils.match
• Issue: Insufficient filtering of semicolons and context path manipulation.

Exploitation Steps:

1. Identify Target: Identify a DataEase instance running a vulnerable version.
2. Craft URL: Craft a URL that includes the whitelist prefix /geo/../context-path/.
3. Send Request: Send the crafted URL to the DataEase application to bypass authentication.

Mitigation Steps:

1. Code Review: Review the TokenFilter class and ensure proper URL validation.
2. Patch Deployment: Apply the patch provided in version 2.10.4.
3. Monitoring: Implement logging and monitoring to detect and respond to suspicious activities.

References:

• GitHub Security Advisory

By addressing this vulnerability promptly, organizations can significantly reduce the risk of unauthorized access and potential data breaches, thereby enhancing their overall cybersecurity posture.