CVE-2020-5771 Explained : Impact and Mitigation

This CVE involves an improper input validation vulnerability in Teltonika firmware TRB2_R_00.02.04.01, allowing a remote attacker to gain root privileges by uploading a malicious backup archive.

Understanding CVE-2020-5771

This CVE highlights a security issue in Teltonika Gateway TRB245 firmware version TRB2_R_00.02.04.01.

What is CVE-2020-5771?

The vulnerability in Teltonika firmware TRB2_R_00.02.04.01 enables a remote, authenticated attacker to achieve root privileges through the upload of a malicious backup archive.

The Impact of CVE-2020-5771

The vulnerability poses a significant risk as it allows unauthorized users to gain elevated privileges on affected systems.

Technical Details of CVE-2020-5771

This section delves into the technical aspects of the CVE.

Vulnerability Description

The flaw lies in the inadequate input validation of backup archive files in Teltonika firmware TRB2_R_00.02.04.01.

Affected Systems and Versions

Product: Teltonika Gateway TRB245
Version: TRB2_R_00.02.04.01 firmware

Exploitation Mechanism

An authenticated attacker can exploit this vulnerability by uploading a specially crafted backup archive to the affected system, granting them root privileges.

Mitigation and Prevention

Protecting systems from CVE-2020-5771 requires immediate action and long-term security measures.

Immediate Steps to Take

Apply security patches provided by Teltonika promptly.
Monitor system logs for any suspicious activities.
Restrict access to the system to authorized personnel only.

Long-Term Security Practices

Regularly update firmware and software to patch known vulnerabilities.
Conduct security assessments and penetration testing to identify and address weaknesses.

Patching and Updates

Teltonika should release a patch addressing the input validation issue promptly.
Ensure all systems are updated with the latest firmware to mitigate the risk of exploitation.