A certain Ubuntu build procedure for perf, as distributed in the Linux kernel packages in Ubuntu 10.04 LTS, 12.04 LTS, 12.10, 13.04, and 13.10, sets the HOME environment variable to the ~buildd directory and consequently reads the system configuration file from the ~buildd directory, which allows local users to gain privileges by leveraging control over the buildd account.
| Software | From | Fixed in |
|---|---|---|
| canonical / ubuntu_linux | 13.04 | 13.04.x |
| canonical / ubuntu_linux | 13.10 | 13.10.x |
| canonical / ubuntu_linux | 12.10 | 12.10.x |
| canonical / ubuntu_linux | 12.04 | 12.04.x |
| canonical / ubuntu_linux | 10.04 | 10.04.x |