{"id":"USN-4233-1","aliases":[],"status":"published","title":"gnutls28 update","description":"As a security improvement, this update marks SHA1 as being untrusted for\ndigital signature operations.","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2020-01-09T12:58:11Z","modified":"2026-04-22T09:50:26Z","fixes":[{"ecosystem":"Ubuntu:16.04:LTS","package":"gnutls28","fixed_in":["3.4.10-4ubuntu1.6"],"sources":["osv"]},{"ecosystem":"Ubuntu:18.04:LTS","package":"gnutls28","fixed_in":["3.5.18-1ubuntu1.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"gnutls28","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.10-4ubuntu1.6"}]}],"versions":["3.3.15-5ubuntu2","3.3.18-1ubuntu1","3.3.20-1ubuntu1","3.4.9-2ubuntu1","3.4.10-4ubuntu1","3.4.10-4ubuntu1.1","3.4.10-4ubuntu1.2","3.4.10-4ubuntu1.3","3.4.10-4ubuntu1.4","3.4.10-4ubuntu1.5"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"gnutls28","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.18-1ubuntu1.2"}]}],"versions":["3.5.8-6ubuntu3","3.5.17-1ubuntu1","3.5.17-1ubuntu3","3.5.18-1ubuntu1","3.5.18-1ubuntu1.1"]}],"references":[{"url":"https://ubuntu.com/security/notices/USN-4233-1","tags":["advisory"]},{"url":"https://launchpad.net/bugs/1858691","tags":["report"]}],"sources":{"osv":[{"id":"USN-4233-1","title":"gnutls28 update","description":"As a security improvement, this update marks SHA1 as being untrusted for\ndigital signature operations.\n","status":"published","published":"2020-01-09T12:58:11Z","modified":"2026-04-22T09:50:26.980806Z","updated_at":"2026-11-02T16:58:14.547547Z"}]}}