Libcontainer and Docker Engine before 1.6.1 opens the file-descriptor passed to the pid-1 process before performing the chroot, which allows local users to gain privileges via a symlink attack in an image.
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{ "binaries": [ { "binary_name": "docker.io", "binary_version": "1.6.2~dfsg1-1ubuntu4" }, { "binary_name": "golang-docker-dev", "binary_version": "1.6.2~dfsg1-1ubuntu4" }, { "binary_name": "vim-syntax-docker", "binary_version": "1.6.2~dfsg1-1ubuntu4" } ], "availability": "No subscription required", "ubuntu_priority": "medium" }