CVE-2017-5986 Explained : Impact and Mitigation

CVE-2017-5986, a vulnerability in the Linux kernel prior to version 4.9.11, involves a race condition in the sctp_wait_for_sndbuf function. This flaw can be exploited by local users, potentially leading to a denial of service due to assertion failure and subsequent panic.

Understanding CVE-2017-5986

This section provides insights into the nature and impact of the CVE-2017-5986 vulnerability.

What is CVE-2017-5986?

The vulnerability in the Linux kernel before version 4.9.11 allows local users to trigger a denial of service by exploiting a race condition in the sctp_wait_for_sndbuf function.

The Impact of CVE-2017-5986

The exploitation of this vulnerability by local users through a multi-threaded application can result in a denial of service due to an assertion failure and subsequent panic.

Technical Details of CVE-2017-5986

Explore the technical aspects of CVE-2017-5986 to understand its implications and affected systems.

Vulnerability Description

The race condition in the sctp_wait_for_sndbuf function in net/sctp/socket.c in the Linux kernel before 4.9.11 allows local users to cause a denial of service through a multithreaded application.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: Linux kernel versions earlier than 4.9.11

Exploitation Mechanism

Local users can exploit this vulnerability through a multi-threaded application that removes an association while it is in a specific buffer-full state, leading to a denial of service.

Mitigation and Prevention

Learn about the steps to mitigate and prevent the CVE-2017-5986 vulnerability.

Immediate Steps to Take

Update to Linux kernel version 4.9.11 or later to mitigate the vulnerability.
Monitor for any unusual activities that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Implement the principle of least privilege to restrict user access.
Regularly update and patch the Linux kernel to address known vulnerabilities.

Patching and Updates

Ensure timely patching and updates of the Linux kernel to protect against potential security risks.