APT before 1.0.9 does not verify downloaded files if they have been modified as indicated using the If-Modified-Since header, which has unspecified impact and attack vectors.
| Software | From | Fixed in |
|---|---|---|
| debian / advanced_package_tool | 1.0.3 | 1.0.3.x |
| debian / advanced_package_tool | 1.0.7 | 1.0.7.x |