CVE-2017-2616 Explained : Impact and Mitigation

Util-linux prior to version 2.32.1 has a race condition vulnerability related to the "su" command, allowing attackers with local authenticated access to terminate unrelated processes with root privileges.

Understanding CVE-2017-2616

A vulnerability in util-linux that could be exploited by attackers with local authenticated access.

What is CVE-2017-2616?

Util-linux before version 2.32.1 is susceptible to a race condition, enabling attackers to terminate processes with root privileges.

The Impact of CVE-2017-2616

CVSS Base Score: 5.5 (Medium)
Attack Vector: Local
Attack Complexity: Low
Privileges Required: Low
Availability Impact: High
This vulnerability allows attackers to kill unrelated processes with root privileges under specific conditions.

Technical Details of CVE-2017-2616

Util-linux vulnerability details and affected systems.

Vulnerability Description

A race condition in util-linux before version 2.32.1 allows local authenticated attackers to terminate processes with root privileges.

Affected Systems and Versions

Affected Product: util-linux
Vendor: Linux
Vulnerable Version: 2.32.1

Exploitation Mechanism

Attackers with local authenticated access can exploit the race condition in the "su" command to terminate processes with root privileges.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2017-2616.

Immediate Steps to Take

Update util-linux to version 2.32.1 or later to eliminate the vulnerability.
Monitor system processes for any unusual activities.

Long-Term Security Practices

Implement the principle of least privilege to restrict user access.
Regularly review and update security configurations to prevent similar vulnerabilities.

Patching and Updates

Apply security patches and updates provided by the vendor to address the vulnerability.