========================================================================== Ubuntu Security Notice USN-4247-3 January 23, 2020
python-apt vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 ESM - Ubuntu 12.04 ESM Summary: Several security issues were fixed in python-apt. Software Description: - python-apt: Python interface to libapt-pkg Details: 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. 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 14.04 ESM: python-apt 0.9.3.5ubuntu3+esm2 python3-apt 0.9.3.5ubuntu3+esm2 Ubuntu 12.04 ESM: python-apt 0.8.3ubuntu7.5 python3-apt 0.8.3ubuntu7.5 In general, a standard system update will make all the necessary changes. References: https://usn.ubuntu.com/4247-3 https://usn.ubuntu.com/4247-1 CVE-2019-15795, CVE-2019-15796
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