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USN-3156-2: APT regression

17 December 2016

USN-3156-1 introduced a regression in unattended-upgrades that may require manual intervention to repair.

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Releases

Packages

  • apt - Advanced front-end for dpkg

Details

USN-3156-1 fixed vulnerabilities in APT. It also caused a bug in
unattended-upgrades on that may require manual intervention to repair.

Users on Ubuntu 16.10 should run the following commands at a
terminal:

sudo dpkg --configure --pending
sudo apt-get -f install

This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Jann Horn discovered that APT incorrectly handled InRelease files.
If a remote attacker were able to perform a machine-in-the-middle attack,
this flaw could potentially be used to install altered packages.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.10

After a standard system update you should run the following commands
to make all the necessary changes:
sudo dpkg --configure --pending
sudo apt-get -f install