USN-4247-2: python-apt regression
22 January 2020
USN-4247-1 introduced a regression in python-apt.
- python-apt - Python interface to libapt-pkg
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)
The problem can be corrected by updating your system to the following package versions:
In general, a standard system update will make all the necessary changes.