CVE-2017-6507 : Vulnerability Insights and Analysis

A vulnerability has been discovered in AppArmor prior to version 2.12. The issue stems from incorrect handling of unknown AppArmor profiles in various scripts and unit files, potentially expanding the attack surface of confined processes.

Understanding CVE-2017-6507

AppArmor vulnerability affecting processes confined by AppArmor due to mishandling of unknown profiles.

What is CVE-2017-6507?

Vulnerability in AppArmor before version 2.12
Incorrect handling of unknown AppArmor profiles in scripts and unit files
Allows attackers to increase attack surfaces of confined processes

The Impact of CVE-2017-6507

Attackers could exploit the issue to expand the attack surface of confined processes
Users of projects like LXD and Docker with custom AppArmor profiles in unconventional directories are affected

Technical Details of CVE-2017-6507

AppArmor vulnerability details.

Vulnerability Description

Incorrect handling of unknown AppArmor profiles in scripts and unit files
Common logic for 'restart' operations removes profiles not in typical locations

Affected Systems and Versions

AppArmor versions before 2.12
Userspace projects like LXD and Docker with custom profiles in non-standard directories

Exploitation Mechanism

Attackers exploit the mishandling of unknown AppArmor profiles to increase attack surfaces

Mitigation and Prevention

Steps to mitigate and prevent CVE-2017-6507.

Immediate Steps to Take

Update AppArmor to version 2.12 or newer
Review and relocate custom AppArmor profiles to standard directories
Monitor for any unusual activities on confined processes

Long-Term Security Practices

Regularly review and update AppArmor configurations
Implement security best practices for process confinement
Conduct security audits to identify vulnerabilities

Patching and Updates

Apply patches provided by AppArmor to fix the vulnerability
Stay informed about security updates and advisories from AppArmor