APT before 0.8.15.2 does not properly validate inline GPG signatures, which allows man-in-the-middle attackers to install modified packages via vectors involving lack of an initial clearsigned message.
| Software | From | Fixed in |
|---|---|---|
| debian / advanced_package_tool | - | 0.8.15.2 |
| canonical / ubuntu_linux | 11.04 | 11.04.x |