CVE-2019-4119 : Exploit Details and Defense Strategies

IBM Cloud Private Kubernetes API server versions 2.1.0, 3.1.0, 3.1.1, and 3.1.2 can act as an HTTP proxy for internal and external IP addresses.

Understanding CVE-2019-4119

This CVE involves the Kubernetes API server versions provided by IBM Cloud Private, which can be exploited as an HTTP proxy for various IP addresses.

What is CVE-2019-4119?

The vulnerability allows the Kubernetes API server versions 2.1.0, 3.1.0, 3.1.1, and 3.1.2 to function as an HTTP proxy for both internal and external target IP addresses.
Associated with IBM X-Force ID 158145.

The Impact of CVE-2019-4119

CVSS Score: 3.1 (Low severity)
Attack Vector: Network
Attack Complexity: High
Integrity Impact: Low
Privileges Required: Low
Exploit Code Maturity: Unproven
Remediation Level: Official Fix
Report Confidence: Confirmed

Technical Details of CVE-2019-4119

The technical details of the vulnerability.

Vulnerability Description

The IBM Cloud Private Kubernetes API server versions 2.1.0, 3.1.0, 3.1.1, and 3.1.2 can be exploited as an HTTP proxy for both internal and external IP addresses.

Affected Systems and Versions

Affected Systems: IBM Cloud Private
Affected Versions: 2.1.0, 3.1.0, 3.1.1, 3.1.2

Exploitation Mechanism

The vulnerability allows attackers to misuse the Kubernetes API server versions as an HTTP proxy for various IP addresses.

Mitigation and Prevention

Ways to mitigate and prevent exploitation of CVE-2019-4119.

Immediate Steps to Take

Apply official fixes provided by IBM.
Monitor network traffic for any suspicious activity.
Restrict access to the Kubernetes API server.

Long-Term Security Practices

Regularly update and patch the IBM Cloud Private environment.
Conduct security assessments and audits periodically.

Patching and Updates

Ensure all systems are updated with the latest patches and security fixes.