Cloud Foundry Garden-Linux versions prior to v0.333.0 and Elastic Runtime 1.6.x version prior to 1.6.17 contain a flaw in managing container files during Docker image preparation that could be used to delete, corrupt or overwrite host files and directories, including other container filesystems on the host.

Cloud Foundry Garden-runC, versions prior to 1.13.0, does not correctly enforce disc quotas for Docker image layers. A remote authenticated user may push an app with a malicious Docker image that will consume more space on a Diego cell than allocated in their quota, potentially causing a DoS against the cell.

Cloud Foundry Garden-runC, versions prior to 1.11.0, contains an information exposure vulnerability. A user with access to Garden logs may be able to obtain leaked credentials and perform authenticated actions using those credentials.

Garden-runC prevents deletion of some app environments

Cloud Foundry Garden-runC release, versions prior to 1.16.1, prevents deletion of some app environments based on file attributes. A remote authenticated malicious user may create and delete apps with crafted file attributes to cause a denial of service for new app instances or scaling up of existing apps.

In Garden versions 0.22.0-0.329.0, a vulnerability has been discovered in the garden-linux nstar executable that allows access to files on the host system. By staging an application on Cloud Foundry using Diego and Garden installations with a malicious custom buildpack an end user could read files on the host system that the BOSH-created vcap user has permissions to read and then package them into their app droplet.