CVE-2020-29138 : Security Advisory and Response

SAGEMCOM F@ST3486 NET DOCSIS 3.0 router software NET_4.109.0 has an Incorrect Access Control vulnerability that allows remote unauthenticated users to download the router configuration file.

Understanding CVE-2020-29138

This CVE identifies a security flaw in the SAGEMCOM F@ST3486 NET DOCSIS 3.0 router software NET_4.109.0 that enables unauthorized access to the router configuration file.

What is CVE-2020-29138?

The vulnerability in the configuration backup path of the router allows remote unauthenticated users to retrieve the configuration file using a specific URI.

The Impact of CVE-2020-29138

The vulnerability poses a risk as it permits unauthorized users to access sensitive router configuration data without proper authentication, potentially leading to further security breaches.

Technical Details of CVE-2020-29138

The technical aspects of the CVE provide insight into the specific details of the vulnerability.

Vulnerability Description

The flaw in the configuration backup path of SAGEMCOM F@ST3486 NET DOCSIS 3.0 software NET_4.109.0 allows remote unauthenticated users to download the router configuration file via the /backupsettings.conf URI.

Affected Systems and Versions

Affected System: SAGEMCOM F@ST3486 NET DOCSIS 3.0 router
Affected Software Version: NET_4.109.0

Exploitation Mechanism

Unauthorized users can exploit the vulnerability by accessing the /backupsettings.conf URI while a valid session is active on the router.

Mitigation and Prevention

Addressing the CVE involves taking immediate steps and implementing long-term security practices.

Immediate Steps to Take

Disable remote access to the router configuration interface if not required.
Regularly monitor and review access logs for any suspicious activities.

Long-Term Security Practices

Implement strong authentication mechanisms for accessing the router configuration.
Keep the router software up to date with the latest security patches.
Conduct regular security audits to identify and address any vulnerabilities.
Educate users on secure configuration practices to prevent unauthorized access.

Patching and Updates

Ensure that the router software is regularly updated with the latest security patches to mitigate the vulnerability.