CVE-2020-24990 : What You Need to Know

An issue was discovered in QSC Q-SYS Core Manager 8.2.1 where a remote attacker can exploit the TFTP service to perform a directory traversal and access sensitive operating system files.

Understanding CVE-2020-24990

This CVE identifies a vulnerability in QSC Q-SYS Core Manager 8.2.1 that allows unauthorized access to system files through a TFTP service.

What is CVE-2020-24990?

The vulnerability in QSC Q-SYS Core Manager 8.2.1 enables a remote attacker to read sensitive operating system files by leveraging the TFTP service on UDP port 69. This can be achieved through a directory traversal attack using a TFTP GET request.

The Impact of CVE-2020-24990

Exploiting this vulnerability can lead to unauthorized disclosure of critical system files, potentially exposing sensitive information and compromising system integrity.

Technical Details of CVE-2020-24990

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The issue in QSC Q-SYS Core Manager 8.2.1 allows remote attackers to access operating system files by exploiting the TFTP service and performing a directory traversal attack.

Affected Systems and Versions

Product: QSC Q-SYS Core Manager 8.2.1
Vendor: QSC
Versions: All versions are affected

Exploitation Mechanism

By sending a malicious TFTP GET request to the TFTP service running on UDP port 69, attackers can traverse directories and retrieve sensitive system files like /etc/passwd or /proc/version.

Mitigation and Prevention

Protecting systems from CVE-2020-24990 requires immediate actions and long-term security practices.

Immediate Steps to Take

Disable or restrict access to the TFTP service if not essential for operations.
Implement network segmentation to limit exposure of critical systems.
Monitor network traffic for any suspicious TFTP activity.

Long-Term Security Practices

Regularly update and patch the QSC Q-SYS Core Manager to address security vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate potential weaknesses.

Patching and Updates

Apply patches and updates provided by QSC to mitigate the vulnerability and enhance system security.