Simple Streams (simplestreams) does not properly verify the GPG signatures of disk image files, which allows remote mirror servers to spoof disk images and have unspecified other impact via a 403 (aka Forbidden) response.
| Software | From | Fixed in |
|---|---|---|
| canonical / ubuntu_linux | 14.04 | 14.04.x |
| canonical / ubuntu_linux | 15.04 | 15.04.x |