CVE-2017-16786 Explained : Impact and Mitigation

Meinberg LANTIME devices with firmware before version 6.24.004 are vulnerable to unauthorized access of arbitrary files through the Web Configuration Utility.

Understanding CVE-2017-16786

This CVE identifies a security vulnerability in Meinberg LANTIME devices that allows remote authenticated users to access arbitrary files.

What is CVE-2017-16786?

The vulnerability in Meinberg LANTIME devices prior to firmware version 6.24.004 enables specific privileged remote authenticated users to access arbitrary files using two methods.

By manipulating the parameter ntpclientcounterlogfile in cgi-bin/mainv2.
By exploiting vulnerabilities in the firmware update functionality that involve the support of the "file" schema by curl.

The Impact of CVE-2017-16786

The vulnerability could lead to unauthorized access to sensitive files and potentially compromise the confidentiality and integrity of the system and data stored on Meinberg LANTIME devices.

Technical Details of CVE-2017-16786

This section provides more technical insights into the vulnerability.

Vulnerability Description

The Web Configuration Utility in Meinberg LANTIME devices with firmware versions before 6.24.004 allows remote authenticated users with specific privileges to read arbitrary files.

Affected Systems and Versions

Meinberg LANTIME devices with firmware versions before 6.24.004.

Exploitation Mechanism

The vulnerability can be exploited by manipulating the ntpclientcounterlogfile parameter in cgi-bin/mainv2 or by leveraging vulnerabilities in the firmware update functionality that involve curl's support of the "file" schema.

Mitigation and Prevention

Protecting systems from CVE-2017-16786 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Meinberg LANTIME devices to version 6.24.004 or later to mitigate the vulnerability.
Restrict access to the Web Configuration Utility to authorized users only.

Long-Term Security Practices

Regularly monitor and audit access to Meinberg LANTIME devices.
Implement strong authentication mechanisms for remote access.

Patching and Updates

Apply security patches and firmware updates provided by Meinberg to address known vulnerabilities and enhance system security.