CVE-2017-1000111 Explained : Impact and Mitigation

A vulnerability has been discovered in the Linux kernel related to AF_PACKET sockets, specifically involving heap out-of-bounds access. This issue is similar to CVE-2016-8655, involving a race condition between socket state modification and safety checks in packet_set_ring.

Understanding CVE-2017-1000111

This CVE entry highlights a vulnerability in the Linux kernel that could potentially lead to security risks.

What is CVE-2017-1000111?

The vulnerability in the Linux kernel pertains to AF_PACKET sockets, specifically concerning heap out-of-bounds access. It shares similarities with CVE-2016-8655, involving a race condition between socket state modification and safety checks in packet_set_ring.

The Impact of CVE-2017-1000111

The vulnerability could allow for unauthorized access and potential exploitation, requiring CAP_NET_RAW privileges in the process namespace for PF_PACKET sockets to be affected.

Technical Details of CVE-2017-1000111

This section delves into the technical aspects of the CVE entry.

Vulnerability Description

The issue involves heap out-of-bounds access in AF_PACKET sockets, similar to CVE-2016-8655, with a race condition between socket state modification and safety checks in packet_set_ring.

Affected Systems and Versions

Product: n/a
Vendor: n/a
Versions: n/a

Exploitation Mechanism

Requires CAP_NET_RAW privileges in the process namespace for PF_PACKET sockets to be affected
With user namespaces enabled, any process can create a namespace with CAP_NET_RAW privileges

Mitigation and Prevention

Mitigation strategies and preventive measures for CVE-2017-1000111.

Immediate Steps to Take

Lock the socket during updates to mitigate the vulnerability

Long-Term Security Practices

Regularly update the Linux kernel and associated components
Implement least privilege access controls to limit potential exploits

Patching and Updates

Stay informed about security advisories and patches from relevant vendors