CVE-2019-11252 : Vulnerability Insights and Analysis

Versions of the Kubernetes kube-controller-manager ranging from v1.0 to v1.17 are at risk of experiencing a credential leakage issue through error messages in logs and events related to failed mounts for AzureFile and CephFS volumes.

Understanding CVE-2019-11252

This CVE involves a vulnerability in Kubernetes that could lead to credential leakage when failing to mount certain volumes.

What is CVE-2019-11252?

The vulnerability in the kube-controller-manager component of Kubernetes versions v1.0 to v1.17 can result in the exposure of sensitive credentials due to error messages in logs and events during failed mount attempts for AzureFile and CephFS volumes.

The Impact of CVE-2019-11252

The impact of this CVE includes:

Confidentiality Impact: High
Integrity Impact: Low
Privileges Required: Low
CVSS Base Score: 5.9 (Medium Severity)

Technical Details of CVE-2019-11252

The technical details of this CVE are as follows:

Vulnerability Description

The kube-controller-manager in affected Kubernetes versions is susceptible to credential leakage through error messages in logs and events related to failed mounts for AzureFile and CephFS volumes.

Affected Systems and Versions

The following Kubernetes versions are affected:

1.16, 1.17, 1.6, 1.7, 1.8, 1.9, 1.10, 1.11, 1.12, 1.13, 1.14, 1.15

Exploitation Mechanism

The vulnerability can be exploited by attackers through error messages generated in logs and events when mounting AzureFile and CephFS volumes fails.

Mitigation and Prevention

To address CVE-2019-11252, consider the following steps:

Immediate Steps to Take

Update Kubernetes to a patched version that addresses the credential leakage issue.
Monitor logs and events for any signs of unauthorized access or credential exposure.

Long-Term Security Practices

Regularly review and update Kubernetes configurations to ensure security best practices are implemented.
Conduct security audits and penetration testing to identify and address any vulnerabilities.

Patching and Updates

Apply patches provided by Kubernetes to fix the vulnerability and prevent credential leakage.