CVE-2017-15868 : Security Advisory and Response

A vulnerability in the Linux kernel prior to version 3.19 allows local users to elevate privileges through a specific function in the Bluetooth protocol.

Understanding CVE-2017-15868

This CVE identifies a security flaw in the Linux kernel that could be exploited by local users to gain elevated privileges.

What is CVE-2017-15868?

The vulnerability exists in the bnep_add_connection function within the Linux kernel's Bluetooth protocol implementation, potentially enabling local users to escalate their privileges.

The Impact of CVE-2017-15868

The vulnerability could allow local users to execute malicious applications and gain elevated privileges on affected systems.

Technical Details of CVE-2017-15868

This section provides more technical insights into the CVE.

Vulnerability Description

The bnep_add_connection function in the Linux kernel before version 3.19 fails to verify the availability of an l2cap socket, enabling local users to gain privileges through a crafted application.

Affected Systems and Versions

Affected System: Linux kernel versions prior to 3.19
Affected Component: bnep_add_connection function in net/bluetooth/bnep/core.c

Exploitation Mechanism

The vulnerability allows local users to exploit the lack of socket verification in the bnep_add_connection function to escalate their privileges by running a malicious application.

Mitigation and Prevention

Protecting systems from CVE-2017-15868 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update to a patched version of the Linux kernel (3.19 or newer)
Monitor system logs for any suspicious activities
Restrict user privileges to minimize the impact of potential attacks

Long-Term Security Practices

Regularly update the Linux kernel and other system components
Implement least privilege access controls to limit user capabilities
Conduct security audits and penetration testing to identify and address vulnerabilities

Patching and Updates

Apply security patches provided by Linux distributions and vendors
Stay informed about security advisories and updates from relevant sources