CVE-2017-7412 : Vulnerability Insights and Analysis

In versions of NixOS earlier than 17.03.887, a vulnerability exists where the Docker socket is writable by any user on the system, allowing local users to escalate their privileges through docker commands.

Understanding CVE-2017-7412

What is CVE-2017-7412?

CVE-2017-7412 is a vulnerability in NixOS versions prior to 17.03.887 that enables local users to gain elevated privileges by exploiting the world-writable Docker socket.

The Impact of CVE-2017-7412

This vulnerability can be exploited by malicious local users to execute unauthorized docker commands, potentially leading to unauthorized access and privilege escalation within the system.

Technical Details of CVE-2017-7412

Vulnerability Description

The vulnerability in NixOS versions before 17.03.887 allows any user on the system to write to the Docker socket, enabling them to execute docker commands and elevate their privileges.

Affected Systems and Versions

Systems running NixOS versions earlier than 17.03.887

Exploitation Mechanism

Local users can exploit the writable Docker socket to execute docker commands, leading to privilege escalation.

Mitigation and Prevention

Immediate Steps to Take

Upgrade to NixOS version 17.03.887 or later to mitigate the vulnerability.
Restrict access to the Docker socket to authorized users only.

Long-Term Security Practices

Regularly monitor and audit permissions on critical system files and sockets.
Implement the principle of least privilege to limit user access rights.

Patching and Updates

Apply security patches and updates promptly to address known vulnerabilities and enhance system security.