CVE-2023-53771

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CVE-2023-53771 vulnerability security critical severity CVE database minidvblinux authentication bypass root password reset

Summary

CVE-2023-53771 is a critical authentication bypass vulnerability affecting MiniDVBLinux 5.4. This vulnerability allows remote attackers to change the root password without authentication by sending crafted POST requests to the system setup endpoint, effectively granting unauthorized access to the system.

Technical Details

CVE-2023-53771 stems from a flaw in the authentication mechanism within the MiniDVBLinux 5.4 system setup. Specifically, the application fails to properly validate user credentials before allowing modifications to the root password. An attacker can exploit this by sending a malicious POST request to the `/system_setup` endpoint. This request contains modified `SYSTEM_PASSWORD` parameters, which the system processes without proper authentication, leading to a reset of the root password. The lack of authentication checks on this critical function allows for complete system compromise.

The vulnerability resides in the handling of HTTP POST requests to the system setup endpoint. The application logic incorrectly assumes that any request to modify the root password is legitimate, bypassing the need for prior authentication. This allows an attacker to arbitrarily set a new root password, effectively gaining full administrative control over the affected system.

Affected Products and Versions

  • MiniDVBLinux 5.4

Impact Assessment

Successful exploitation of CVE-2023-53771 allows an unauthenticated attacker to gain complete control of the affected MiniDVBLinux system. This can lead to severe consequences, including:

  • Full System Compromise: The attacker gains root access, enabling them to execute arbitrary commands, install malware, and modify system configurations.
  • Data Breach: Sensitive data stored on the system can be accessed, exfiltrated, or manipulated by the attacker.
  • Denial of Service: The attacker can disrupt the normal operation of the system, rendering it unavailable to legitimate users.
  • Lateral Movement: The compromised system can be used as a stepping stone to attack other systems on the same network.

Remediation

Currently, there is no official patch available for CVE-2023-53771. Users of MiniDVBLinux 5.4 are strongly advised to take the following steps to mitigate the risk:

Immediate Actions

  • Isolate the System: If possible, isolate the MiniDVBLinux system from the network to prevent remote exploitation.
  • Monitor Network Traffic: Monitor network traffic for suspicious activity, particularly POST requests to the `/system_setup` endpoint.
  • Restrict Access: Implement strict access control policies to limit access to the MiniDVBLinux system.

Long-term Solutions

  • Upgrade to a Secure Version: If a patched version becomes available, upgrade to it immediately.
  • Implement Strong Authentication: Ensure that all critical functions, including password changes, require strong authentication.
  • Input Validation: Implement robust input validation to prevent malicious data from being processed by the system.

References

Detection & Scanning

Detecting CVE-2023-53771 requires careful monitoring of network traffic and system logs. Look for suspicious POST requests to the `/system_setup` endpoint, especially those containing modified `SYSTEM_PASSWORD` parameters. Regular security audits and vulnerability scans can also help identify vulnerable systems.

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