ext/common/ServerInstanceDir.h in Phusion Passenger gem before 4.0.6 for Ruby allows local users to gain privileges or possibly change the ownership of arbitrary directories via a symlink attack on a directory with a predictable name in /tmp/.
{ "ubuntu_priority": "medium", "availability": "No subscription required", "binaries": [ { "binary_name": "libapache2-mod-passenger", "binary_version": "4.0.37-2" }, { "binary_name": "ruby-passenger", "binary_version": "4.0.37-2" }, { "binary_name": "ruby-passenger-doc", "binary_version": "4.0.37-2" } ] }