EUVD-2025-198223

Comprehensive Technical Analysis of EUVD-2025-198223

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-198223 pertains to an Insecure Direct Object Reference (IDOR) in the Rallly open-source scheduling and collaboration tool. This vulnerability allows any authenticated user to finalize a poll they do not own by manipulating the pollId parameter in the request. The severity of this vulnerability is significant, as indicated by its CVSS Base Score of 9.1.

CVSS Vector Breakdown:

• AV:N (Network Vector): The vulnerability is exploitable over the network.
• AC:L (Low Complexity): The attack requires low skill or resources.
• PR:N (No Privileges Required): No special privileges are needed to exploit the vulnerability.
• UI:N (No User Interaction): No user interaction is required for the attack to succeed.
• S:U (Unchanged): The impact scope is unchanged.
• C:N (No Confidentiality Impact): There is no direct impact on data confidentiality.
• I:H (High Integrity Impact): The vulnerability has a high impact on data integrity.
• A:H (High Availability Impact): The vulnerability has a high impact on system availability.

Given these factors, the vulnerability is classified as critical, necessitating immediate attention and remediation.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Authenticated User Exploitation: An authenticated user can manipulate the pollId parameter in the request to finalize polls they do not own.
• Automated Scripts: Malicious actors could use automated scripts to systematically target and finalize polls, disrupting user workflows and causing data integrity issues.

Exploitation Methods:

• Parameter Tampering: By intercepting and modifying the pollId parameter in the HTTP request, an attacker can finalize any poll.
• Cross-Site Request Forgery (CSRF): Although not explicitly mentioned, if CSRF protections are lacking, an attacker could exploit this vulnerability via CSRF attacks.

3. Affected Systems and Software Versions

Affected Systems:

• All instances of Rallly running versions prior to 4.5.4.

Software Versions:

• Rallly versions < 4.5.4 are vulnerable.
• The vulnerability has been patched in version 4.5.4.

4. Recommended Mitigation Strategies

Immediate Actions:

• Upgrade to Version 4.5.4: Immediately upgrade all instances of Rallly to version 4.5.4 or later.
• Access Controls: Implement strict access controls and validate user permissions before allowing any actions on polls.
• Input Validation: Ensure robust input validation and sanitization for all parameters, especially pollId.

Long-Term Strategies:

• Regular Security Audits: Conduct regular security audits and code reviews to identify and mitigate similar vulnerabilities.
• User Education: Educate users about the risks of parameter tampering and the importance of reporting suspicious activities.
• Monitoring and Logging: Implement comprehensive monitoring and logging to detect and respond to any unauthorized access attempts.

5. Impact on European Cybersecurity Landscape

The vulnerability in Rallly, an open-source tool widely used for scheduling and collaboration, poses a significant risk to organizations relying on it. The potential for data integrity and availability issues can disrupt critical workflows, leading to operational inefficiencies and potential data loss. Given the collaborative nature of the tool, the impact could be widespread, affecting multiple sectors including education, healthcare, and business.

6. Technical Details for Security Professionals

Vulnerability Details:

• Type: Insecure Direct Object Reference (IDOR)
• Location: Poll finalization feature
• Parameter: pollId
• Exploitability: Authenticated users can manipulate the pollId parameter to finalize polls they do not own.

Detection and Response:

• Detection: Implement intrusion detection systems (IDS) to monitor for unusual patterns in poll finalization requests.
• Response: Develop incident response plans to quickly address any unauthorized poll finalizations. Ensure backups are in place to restore data integrity if needed.

Patch Information:

• Patch Version: 4.5.4
• Release Notes: Rallly v4.5.4 Release Notes

References:

• Advisory: GitHub Security Advisory

By addressing this vulnerability promptly and implementing robust security measures, organizations can mitigate the risks associated with this IDOR vulnerability and ensure the continued integrity and availability of their scheduling and collaboration processes.