Description
Silverpeas before 6.3.5 allows authentication bypass by omitting the Password field to AuthenticationServlet, often providing an unauthenticated user with superadmin access.
EPSS Score:
1%
Comprehensive Technical Analysis of EUVD-2024-1920
1. Vulnerability Assessment and Severity Evaluation
Vulnerability Description: The vulnerability in Silverpeas before version 6.3.5 allows authentication bypass by omitting the Password field to AuthenticationServlet. This can often result in unauthenticated users gaining superadmin access.
Severity Evaluation:
- Base Score: 9.8 (Critical)
- Base Score Version: CVSS:3.1
- Base Score Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The CVSS score of 9.8 indicates a critical vulnerability. The vector string breaks down as follows:
- AV:N (Attack Vector: Network) - The vulnerability is exploitable over the network.
- AC:L (Attack Complexity: Low) - The attack requires low complexity.
- PR:N (Privileges Required: None) - No privileges are required to exploit the vulnerability.
- UI:N (User Interaction: None) - No user interaction is required.
- S:U (Scope: Unchanged) - The vulnerability does not change the security scope.
- C:H (Confidentiality: High) - There is a high impact on confidentiality.
- I:H (Integrity: High) - There is a high impact on integrity.
- A:H (Availability: High) - There is a high impact on availability.
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- Network-Based Attack: An attacker can exploit this vulnerability remotely over the network.
- Authentication Bypass: By omitting the Password field in the AuthenticationServlet, an attacker can bypass authentication mechanisms.
Exploitation Methods:
- Direct Exploitation: An attacker can send a specially crafted HTTP request to the AuthenticationServlet, omitting the Password field, to gain unauthorized access.
- Automated Scripts: Attackers can use automated scripts to exploit this vulnerability en masse, targeting multiple instances of Silverpeas.
3. Affected Systems and Software Versions
Affected Software:
- Silverpeas versions before 6.3.5
Affected Systems:
- Any system running the affected versions of Silverpeas, including but not limited to:
- Enterprise collaboration platforms
- Document management systems
- Project management tools
4. Recommended Mitigation Strategies
Immediate Actions:
- Upgrade: Upgrade to Silverpeas version 6.3.5 or later, which includes the fix for this vulnerability.
- Patch Management: Ensure that all systems running Silverpeas are regularly updated and patched.
Long-Term Strategies:
- Access Controls: Implement strict access controls and monitoring to detect and prevent unauthorized access attempts.
- Network Segmentation: Segment the network to limit the exposure of critical systems.
- Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious activity.
- Security Audits: Conduct regular security audits and vulnerability assessments.
5. Impact on European Cybersecurity Landscape
Impact Analysis:
- Widespread Adoption: Given the widespread adoption of Silverpeas in European organizations, this vulnerability poses a significant risk to the cybersecurity landscape.
- Data Breaches: Unauthorized access to superadmin accounts can lead to data breaches, loss of sensitive information, and potential financial losses.
- Compliance Risks: Organizations may face compliance risks under regulations such as GDPR if sensitive data is compromised.
Mitigation Efforts:
- Collaboration: European cybersecurity agencies should collaborate to disseminate information and best practices for mitigating this vulnerability.
- Awareness Campaigns: Conduct awareness campaigns to educate organizations about the risks and necessary mitigation steps.
6. Technical Details for Security Professionals
Technical Analysis:
- Vulnerable Component: The AuthenticationServlet in Silverpeas versions before 6.3.5.
- Exploit Mechanism: The vulnerability is triggered by omitting the Password field in the authentication request, leading to unauthorized access.
- Code Review: Review the commit 11fb5e21c252ce4751b85fccf5b8076156e0b4f0 for the specific code changes that address this vulnerability.
References:
Conclusion: The EUVD-2024-1920 vulnerability in Silverpeas is critical and requires immediate attention. Organizations should prioritize upgrading to the patched version and implement robust security measures to mitigate the risk of unauthorized access and potential data breaches. Collaboration and awareness campaigns are essential to safeguard the European cybersecurity landscape.