CVE-2019-4439 : Exploit Details and Defense Strategies

IBM Cloud Private versions 3.1.0, 3.1.1, and 3.1.2 are affected by a session fixation vulnerability that could allow a local user to impersonate another user on the system.

Understanding CVE-2019-4439

This CVE involves a security issue in IBM Cloud Private versions 3.1.0, 3.1.1, and 3.1.2 that could potentially lead to session impersonation by a local user.

What is CVE-2019-4439?

The vulnerability in IBM Cloud Private versions 3.1.0, 3.1.1, and 3.1.2 allows a local user to impersonate another user on the system by failing to invalidate sessions upon logout.

The Impact of CVE-2019-4439

The impact of this vulnerability is rated as MEDIUM with a CVSS base score of 5.9. It could result in a local user gaining unauthorized access and potentially compromising system integrity.

Technical Details of CVE-2019-4439

This section provides more technical insights into the vulnerability.

Vulnerability Description

IBM Cloud Private versions 3.1.0, 3.1.1, and 3.1.2 do not properly invalidate sessions upon logout, enabling a local user to impersonate another user on the system.

Affected Systems and Versions

Product: IBM Cloud Private
Vendor: IBM
Affected Versions: 3.1.0, 3.1.1, 3.1.2

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Local
Privileges Required: None
User Interaction: None
Exploit Code Maturity: Unproven

Mitigation and Prevention

To address and prevent the exploitation of CVE-2019-4439, follow these mitigation strategies:

Immediate Steps to Take

Update IBM Cloud Private to a patched version.
Monitor user sessions and logouts for any suspicious activity.
Implement strong authentication mechanisms.

Long-Term Security Practices

Regularly review and update session management policies.
Conduct security training for users on session security best practices.

Patching and Updates

Apply official fixes provided by IBM for Cloud Private versions 3.1.0, 3.1.1, and 3.1.2.