CVE-2017-3256 Explained : Impact and Mitigation

A vulnerability in the Oracle MySQL Server component, affecting versions 5.7.16 and earlier, can be exploited by a low privileged attacker through various protocols, potentially leading to a denial of service situation.

Understanding CVE-2017-3256

This CVE entry describes a vulnerability in the Oracle MySQL Server component, specifically in the Server Replication feature.

What is CVE-2017-3256?

The vulnerability affects versions 5.7.16 and earlier of the Oracle MySQL Server.
It can be exploited by a low privileged attacker through multiple protocols.
Successful exploitation can result in unauthorized manipulation of the server, leading to a denial of service situation.

The Impact of CVE-2017-3256

The vulnerability can cause the MySQL Server to hang or crash repeatedly, impacting availability.
It has been assigned a CVSS v3.0 Base Score of 6.5, indicating its moderate impact on availability.

Technical Details of CVE-2017-3256

This section provides technical details about the vulnerability.

Vulnerability Description

The vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Replication) allows unauthorized server manipulation.

Affected Systems and Versions

Oracle MySQL Server versions 5.7.16 and earlier are affected by this vulnerability.

Exploitation Mechanism

Low privileged attackers with network access via various protocols can exploit this vulnerability.

Mitigation and Prevention

Here are the steps to mitigate and prevent exploitation of CVE-2017-3256.

Immediate Steps to Take

Update MySQL Server to a non-vulnerable version.
Implement network security measures to restrict access to the server.
Monitor server logs for any suspicious activities.

Long-Term Security Practices

Regularly update and patch the MySQL Server to address security vulnerabilities.
Conduct security training for staff to raise awareness of potential threats.

Patching and Updates

Apply security patches provided by Oracle for the MySQL Server.