Description
MiniDVBLinux 5.4 contains an authentication bypass vulnerability that allows remote attackers to change the root password without authentication. Attackers can send crafted POST requests to the system setup endpoint with modified SYSTEM_PASSWORD parameters to reset root credentials.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2023-60181
1. Vulnerability Assessment and Severity Evaluation
Vulnerability Description: MiniDVBLinux 5.4 contains an authentication bypass vulnerability that allows remote attackers to change the root password without authentication. This is achieved by sending crafted POST requests to the system setup endpoint with modified SYSTEM_PASSWORD parameters.
Severity Evaluation:
The vulnerability has a CVSS Base Score of 9.3, which is considered critical. The CVSS vector string CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N indicates the following:
- Attack Vector (AV): Network (N) - The vulnerability is exploitable over the network.
- Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
- Authentication (AT): None (N) - No authentication is required to exploit the vulnerability.
- Privileges Required (PR): None (N) - No privileges are required to exploit the vulnerability.
- User Interaction (UI): None (N) - No user interaction is required to exploit the vulnerability.
- Confidentiality Impact (VC): High (H) - The vulnerability has a high impact on confidentiality.
- Integrity Impact (VI): High (H) - The vulnerability has a high impact on integrity.
- Availability Impact (VA): None (N) - The vulnerability does not impact availability.
- Scope Change (SC): None (N) - The vulnerability does not change the security scope.
- Scope Integrity (SI): None (N) - The vulnerability does not impact the integrity of the security scope.
- Scope Availability (SA): None (N) - The vulnerability does not impact the availability of the security scope.
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- Remote Exploitation: Attackers can exploit this vulnerability remotely by sending crafted POST requests to the system setup endpoint.
- Network-Based Attacks: Since the attack vector is network-based, attackers can target the system over the internet or local network.
Exploitation Methods:
- Crafted POST Requests: Attackers can send specially crafted POST requests to the system setup endpoint with modified SYSTEM_PASSWORD parameters to reset the root credentials.
- Automated Scripts: Attackers can use automated scripts to scan for vulnerable systems and exploit them en masse.
3. Affected Systems and Software Versions
Affected Systems:
- MiniDVBLinux versions ≤5.4
Software Versions:
- All versions of MiniDVBLinux up to and including 5.4 are affected by this vulnerability.
4. Recommended Mitigation Strategies
Immediate Mitigation:
- Patching: Upgrade to a patched version of MiniDVBLinux that addresses this vulnerability.
- Network Segmentation: Isolate vulnerable systems from the internet and limit network access to trusted devices.
- Firewall Rules: Implement firewall rules to block unauthorized access to the system setup endpoint.
Long-Term Mitigation:
- Regular Updates: Ensure that all software, including MiniDVBLinux, is regularly updated to the latest versions.
- Access Controls: Implement strict access controls and authentication mechanisms to prevent unauthorized access.
- Monitoring: Continuously monitor network traffic for suspicious activities and anomalies.
5. Impact on European Cybersecurity Landscape
Impact Assessment:
- Critical Infrastructure: If MiniDVBLinux is used in critical infrastructure, this vulnerability could lead to significant security breaches and operational disruptions.
- Data Integrity: The ability to change root passwords without authentication poses a high risk to data integrity and confidentiality.
- Compliance: Organizations may face compliance issues if they fail to address this vulnerability, especially in sectors with stringent cybersecurity regulations.
Regulatory Implications:
- GDPR: Organizations must ensure that personal data is protected, and failure to address this vulnerability could result in GDPR violations.
- NIS Directive: Critical infrastructure providers must comply with the NIS Directive, which mandates robust cybersecurity measures.
6. Technical Details for Security Professionals
Exploit Details:
- Endpoint: The system setup endpoint is vulnerable to crafted POST requests.
- Parameters: The SYSTEM_PASSWORD parameter can be modified to reset the root credentials.
- Payload: The payload for the POST request can be crafted to include the new root password without requiring authentication.
Detection Methods:
- Intrusion Detection Systems (IDS): Configure IDS to detect and alert on suspicious POST requests to the system setup endpoint.
- Log Analysis: Regularly review system logs for unauthorized access attempts and successful password changes.
Response Strategies:
- Incident Response Plan: Develop and implement an incident response plan to quickly address and mitigate any exploitation attempts.
- Forensic Analysis: Conduct forensic analysis to identify the source of the attack and the extent of the compromise.
References:
By addressing this vulnerability promptly and implementing robust security measures, organizations can significantly reduce the risk of exploitation and protect their systems and data.