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CVE-2019-15796

Published: 20 January 2020

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.

Notes

AuthorNote
mdeslaur
this requires a fix in aptdaemon also

Priority

Medium

Cvss 3 Severity Score

4.7

Score breakdown

Status

Package Release Status
python-apt
Launchpad, Ubuntu, Debian
bionic
Released (1.6.5ubuntu0.1)
disco
Released (1.8.5~ubuntu0.2)
eoan
Released (1.9.0ubuntu1.2)
trusty
Released (0.9.3.5ubuntu3+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream Needs triage

xenial
Released (1.1.0~beta1ubuntu0.16.04.7)

Severity score breakdown

Parameter Value
Base score 4.7
Attack vector Network
Attack complexity High
Privileges required None
User interaction Required
Scope Changed
Confidentiality Low
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N