CVE-2018-11084 : Exploit Details and Defense Strategies

Cloud Foundry Garden-runC release, versions before 1.16.1, have a flaw that restricts the removal of certain application environments based on their file attributes. An attacker who is authenticated remotely can exploit this vulnerability by creating and deleting apps with manipulated file attributes, leading to a denial of service.

Understanding CVE-2018-11084

This CVE involves a logic error in Cloud Foundry Garden-runC that prevents the deletion of specific app environments, potentially causing a denial of service.

What is CVE-2018-11084?

CVE ID: CVE-2018-11084
Vendor: Cloud Foundry
Affected Versions: All versions before 1.16.1
Type: Logic error
CVSS Base Score: 6.8 (Medium severity)
Attack Vector: Network
Privileges Required: Low
User Interaction: Required
Impact: Denial of service

The Impact of CVE-2018-11084

The vulnerability in Garden-runC can have the following consequences:

Remote authenticated attackers can disrupt app creation and scaling.
Denial of service leading to the inability to create new app instances or scale up existing ones.

Technical Details of CVE-2018-11084

Cloud Foundry Garden-runC's vulnerability can be further understood through the following technical details:

Vulnerability Description

The flaw in Garden-runC allows attackers to manipulate file attributes to prevent the deletion of specific app environments.

Affected Systems and Versions

All versions of Garden-runC before 1.16.1 are impacted by this vulnerability.

Exploitation Mechanism

Attackers with remote authentication can exploit this vulnerability by creating and deleting apps with crafted file attributes, causing a denial of service.

Mitigation and Prevention

To address CVE-2018-11084, consider the following mitigation strategies:

Immediate Steps to Take

Update Garden-runC to version 1.16.1 or later to mitigate the vulnerability.
Monitor app creation and deletion activities for any suspicious behavior.

Long-Term Security Practices

Implement strong authentication mechanisms to prevent unauthorized access.
Regularly review and update file attribute permissions to avoid exploitation.

Patching and Updates

Stay informed about security updates and patches released by Cloud Foundry.
Apply patches promptly to ensure the security of your environment.