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Ubuntu Security Notice USN-3863-2
January 22, 2019

apt vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 ESM

Summary:

An attacker could trick APT into installing altered packages.

Software Description:
- apt: Advanced front-end for dpkg

Details:

USN-3863-1 fixed a vulnerability in APT. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 Max Justicz discovered that APT incorrectly handled certain parameters
 during redirects. If a remote attacker were able to perform a
 man-in-the-middle attack, this flaw could potentially be used to
 install altered packages.

Update instructions:

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

Ubuntu 12.04 ESM:
  apt                             0.8.16~exp12ubuntu10.28

In general, a standard system update will make all the necessary
changes.

References:
  https://usn.ubuntu.com/usn/usn-3863-2
  https://usn.ubuntu.com/usn/usn-3863-1
  CVE-2019-3462