Python-apt doesn't check if hashes are signed in `Version.fetch_binary()` and `Version.fetch_source()` of apt/package.py or in `_fetch_archives()` of apt/cache.py in version 1.9.3ubuntu2 and earlier. This allows downloads from unsigned repositories which shouldn't be allowed and has been fixed in verisions 1.9.5, 1.9.0ubuntu1.2, 1.6.5ubuntu0.1, 1.1.0~beta1ubuntu0.16.04.7, 0.9.3.5ubuntu3+esm2, and 0.8.3ubuntu7.5.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade python-apt | Jan 27, 2020 | Jan 27, 2020 |
| Ubuntu | — | Upgrade python3-apt (Ubuntu Pro)Upgrade python3-aptUpgrade python-apt (Ubuntu Pro)Upgrade python-apt | Jan 23, 2020 | Jan 22, 2020 |
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