CVE-2019-15796: python-apt downloads from untrusted sources

Severity: medium (CVSS 4.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-03-26 · updated 2026-06-17
Weakness: CWE-287

Description

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.

Affected products

Debian Python-Apt: 1.8.4
Ubuntu Python-Apt: 0.8.0-ubuntu9, 0.8.1-ubuntu1, 0.8.3-ubuntu1, 0.8.3-ubuntu2, 0.8.3-ubuntu3, 0.8.3-ubuntu4 (+59)

References

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