Red Hat Security Advisory 2015-1897-01 – OpenStack Image service provides discovery, registration, and delivery services for disk and server images. It provides the ability to copy or snapshot a server image, and immediately store it away. Stored images can be used as a template to get new servers up and running quickly and more consistently than installing a server operating system and individually configuring additional services. A flaw was discovered in the OpenStack Image service where a tenant could manipulate the status of their images by submitting an HTTP PUT request together with an ‘x-image-meta-status’ header. A malicious tenant could exploit this flaw to reactivate disabled images, bypass storage quotas, and in some cases replace image contents. Setups using the Image service’s v1 API could allow the illegal modification of image status. Additionally, setups which also use the v2 API could allow a subsequent re-upload of image contents.