CVE-2018-1636 Explained : Impact and Mitigation

An authenticated user can exploit a stack-based buffer overflow vulnerability in oninit of IBM Informix Dynamic Server Enterprise Edition 12.1, potentially leading to escalating to a root shell.

Understanding CVE-2018-1636

This CVE involves a high-severity vulnerability in IBM Informix Dynamic Server Enterprise Edition 12.1 that allows an authenticated user to execute arbitrary code with root privileges.

What is CVE-2018-1636?

An authenticated user can trigger a stack-based buffer overflow in oninit of IBM Informix Dynamic Server Enterprise Edition 12.1.
This could enable the attacker to run specific code with root privileges, potentially leading to gaining full control over the system.

The Impact of CVE-2018-1636

CVSS Base Score: 8.2 (High)
Severity: High
Confidentiality, Integrity, and Availability Impact: High
Attack Vector: Local
Privileges Required: High
Exploit Code Maturity: Unproven
Remediation Level: Official Fix
Report Confidence: Confirmed

Technical Details of CVE-2018-1636

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability is a stack-based buffer overflow in oninit in IBM Informix Dynamic Server Enterprise Edition 12.1.
It allows an authenticated user to execute predefined code with root privileges.

Affected Systems and Versions

Affected Product: Informix Dynamic Server Enterprise Edition
Vendor: IBM
Affected Version: 12.1

Exploitation Mechanism

The attacker needs to be an authenticated user to exploit this vulnerability.
By triggering the stack-based buffer overflow in oninit, the attacker can execute malicious code with elevated privileges.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.

Immediate Steps to Take

Apply the official fix provided by IBM to patch the vulnerability.
Monitor system activity for any signs of unauthorized access or malicious behavior.
Restrict user privileges to minimize the impact of potential attacks.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Conduct security training for users to raise awareness about safe computing practices.

Patching and Updates

Ensure that all systems running IBM Informix Dynamic Server Enterprise Edition 12.1 are updated with the latest security patches.