USN-4247-2: python-apt regression
python-apt regression
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 19.10
- Ubuntu 19.04
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary
USN-4247-1 introduced a regression in python-apt.
Software Description
- python-apt – Python interface to libapt-pkg
Details
USN-4247-1 fixed vulnerabilities in python-apt. The updated packages caused
a regression when attempting to upgrade to a new Ubuntu release. This
update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
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
man-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)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 19.10
- python-apt – 1.9.0ubuntu1.3
- python3-apt – 1.9.0ubuntu1.3
- Ubuntu 19.04
- python-apt – 1.8.5~ubuntu0.3
- python3-apt – 1.8.5~ubuntu0.3
- Ubuntu 18.04 LTS
- python-apt – 1.6.5ubuntu0.2
- python3-apt – 1.6.5ubuntu0.2
- Ubuntu 16.04 LTS
- python-apt – 1.1.0~beta1ubuntu0.16.04.8
- python3-apt – 1.1.0~beta1ubuntu0.16.04.8
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
References
Source: USN-4247-2: python-apt regression
