CVE-2017-6590 : What You Need to Know

A vulnerability in network-manager-applet in various Ubuntu versions allows a local attacker to execute arbitrary commands and access local files through the default login screen.

Understanding CVE-2017-6590

This CVE identifies a security flaw in network-manager-applet affecting Ubuntu versions 12.04 LTS, 14.04 LTS, 16.04 LTS, and 16.10.

What is CVE-2017-6590?

An attacker with physical access to a locked computer and Wi-Fi enabled can exploit the default Ubuntu login screen using a specially crafted access point, gaining unauthorized access to files and executing commands.

The Impact of CVE-2017-6590

The vulnerability allows attackers to browse directories, open applications like Firefox to download malicious binaries, and execute arbitrary commands as the lightdm user.

Technical Details of CVE-2017-6590

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The flaw in network-manager-applet permits a local attacker to bypass security measures and gain unauthorized access to the system.

Affected Systems and Versions

Ubuntu 12.04 LTS
Ubuntu 14.04 LTS
Ubuntu 16.04 LTS
Ubuntu 16.10

Exploitation Mechanism

Attacker needs physical access to a locked computer with Wi-Fi turned on
Crafting a special access point requiring a certificate for login
Accessing local files, executing commands, and downloading malicious binaries

Mitigation and Prevention

Protecting systems from CVE-2017-6590 requires immediate actions and long-term security practices.

Immediate Steps to Take

Disable Wi-Fi when not in use
Avoid leaving computers unattended in public areas
Regularly monitor system activities for suspicious behavior

Long-Term Security Practices

Implement strong authentication methods
Keep systems updated with the latest security patches

Patching and Updates

Apply security updates provided by Ubuntu to address the vulnerability