CVE-2021-44466 Explained : Impact and Mitigation
Learn about CVE-2021-44466 affecting Bitmask Riseup VPN 0.21.6, enabling lower privileged users to escalate privileges. Find mitigation steps and update guidance here.
Bitmask Riseup VPN 0.21.6 contains a local privilege escalation vulnerability that allows lower privileged users to gain Administrator privileges.
Understanding CVE-2021-44466
What is CVE-2021-44466?
Bitmask Riseup VPN 0.21.6 has a flaw that enables lower privileged users to replace the VPN executable with a malicious one, potentially escalating their privileges to Administrator level.
The Impact of CVE-2021-44466
The vulnerability allows users to elevate their access and potentially compromise the system by running malicious executables with higher privileges.
Technical Details of CVE-2021-44466
Vulnerability Description
The flaw in Bitmask Riseup VPN 0.21.6 arises from improper access controls during installation, enabling unauthorized users to replace the VPN executable with a malicious one.
Affected Systems and Versions
- Product: Bitmask Riseup VPN 0.21.6
- Version: 0.21.6
Exploitation Mechanism
- Improper ACLs set during software installation
- Replacement of VPN executable with a malicious one
Mitigation and Prevention
Immediate Steps to Take
- Ensure the VPN software is installed in the default directory
- Regularly monitor file integrity and permissions
Long-Term Security Practices
- Implement the principle of least privilege
- Conduct regular security training for users on privilege escalation risks
Patching and Updates
- Update the VPN software to the latest version to patch the privilege escalation vulnerability