Ubuntu Security Notice 4247-3 - USN-4247-1 fixed several vulnerabilities in python-apt. This update provides the corresponding updates for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. 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. Various other issues were also addressed.
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