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CVE-2019-15795 — python-apt uses MD5 for validation

2026-09-29T16:27:07.160641+00:00

Affected: Canonical Python-apt

python-apt only checks the MD5 sums of downloaded files in `Version.fetch_binary()` and `Version.fetch_source()` of apt/package.py in version 1.9.0ubuntu1 and earlier. This allows a man-in-the-middle attack which could potentially be used to install altered packages and has been fixed in versions 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.

USN-4247-1 — python-apt vulnerabilities

2026-09-29T16:27:07.160735+00:00

Affected: Ubuntu:16.04:LTS: python-apt, Ubuntu:18.04:LTS: python-apt

It was discovered that python-apt would still use MD5 hashes to validate certain downloaded packages. If a remote attacker were able to perform a machine-in-the-middle attack, this flaw could potentially be used to install altered packages. (CVE-2019-15795)

It was discovered that python-apt could install packages from untrusted repositories, contrary to expectations. (CVE-2019-15796)