{"id":"USN-4247-2","aliases":[],"status":"published","title":"python-apt regression","description":"USN-4247-1 fixed vulnerabilities in python-apt. The updated packages caused\na regression when attempting to upgrade to a new Ubuntu release. This\nupdate fixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that python-apt would still use MD5 hashes to validate\n certain downloaded packages. If a remote attacker were able to perform a\n machine-in-the-middle attack, this flaw could potentially be used to install\n altered packages. (CVE-2019-15795)\n \n It was discovered that python-apt could install packages from untrusted\n repositories, contrary to expectations. (CVE-2019-15796)","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2020-01-22T23:11:22Z","modified":"2026-04-22T10:01:55Z","fixes":[{"ecosystem":"Ubuntu:16.04:LTS","package":"python-apt","fixed_in":["1.1.0~beta1ubuntu0.16.04.8"],"sources":["osv"]},{"ecosystem":"Ubuntu:18.04:LTS","package":"python-apt","fixed_in":["1.6.5ubuntu0.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"python-apt","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.0~beta1ubuntu0.16.04.8"}]}],"versions":["1.0.1build1","1.0.1ubuntu2","1.1.0~beta1","1.1.0~beta1build1","1.1.0~beta1ubuntu0.16.04.1","1.1.0~beta1ubuntu0.16.04.2","1.1.0~beta1ubuntu0.16.04.4","1.1.0~beta1ubuntu0.16.04.5","1.1.0~beta1ubuntu0.16.04.7"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"python-apt","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.5ubuntu0.2"}]}],"versions":["1.4.0~beta3build2","1.4.0~beta3ubuntu1","1.6.0~rc2ubuntu1","1.6.0~rc2ubuntu2","1.6.0","1.6.1","1.6.2","1.6.3","1.6.3ubuntu1","1.6.4","1.6.5ubuntu0.1"]}],"references":[{"url":"https://ubuntu.com/security/notices/USN-4247-2","tags":["advisory"]},{"url":"https://launchpad.net/bugs/1860606","tags":["report"]}],"sources":{"osv":[{"id":"USN-4247-2","title":"python-apt regression","description":"USN-4247-1 fixed vulnerabilities in python-apt. The updated packages caused\na regression when attempting to upgrade to a new Ubuntu release. This\nupdate fixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that python-apt would still use MD5 hashes to validate\n certain downloaded packages. If a remote attacker were able to perform a\n machine-in-the-middle attack, this flaw could potentially be used to install\n altered packages. (CVE-2019-15795)\n \n It was discovered that python-apt could install packages from untrusted\n repositories, contrary to expectations. (CVE-2019-15796)\n","status":"published","published":"2020-01-22T23:11:22Z","modified":"2026-04-22T10:01:55.98156Z","updated_at":"2026-11-02T16:58:14.547547Z"}]}}