{"id":"USN-3795-3","aliases":[],"status":"published","title":"libssh regression","description":"USN-3795-1 and USN-3795-2 fixed a vulnerability in libssh. The upstream\nfix introduced a regression. This update fixes the problem.\n\nOriginal advisory details:\n\n Peter Winter-Smith discovered that libssh incorrectly handled\n authentication when being used as a server. A remote attacker could use\n this issue to bypass authentication without any credentials.","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2018-11-29T14:42:17Z","modified":"2026-04-22T09:51:35Z","fixes":[{"ecosystem":"Ubuntu:14.04:LTS","package":"libssh","fixed_in":["0.6.1-0ubuntu3.5"],"sources":["osv"]},{"ecosystem":"Ubuntu:16.04:LTS","package":"libssh","fixed_in":["0.6.3-4.3ubuntu0.2"],"sources":["osv"]},{"ecosystem":"Ubuntu:18.04:LTS","package":"libssh","fixed_in":["0.8.0~20170825.94fa1e38-1ubuntu0.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:14.04:LTS","package":"libssh","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.1-0ubuntu3.5"}]}],"versions":["0.5.4-1","0.6.1-0ubuntu2","0.6.1-0ubuntu3","0.6.1-0ubuntu3.1","0.6.1-0ubuntu3.3","0.6.1-0ubuntu3.4"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"libssh","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.3-4.3ubuntu0.2"}]}],"versions":["0.6.3-3ubuntu3","0.6.3-4.1","0.6.3-4.2","0.6.3-4.2ubuntu1","0.6.3-4.3","0.6.3-4.3ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"libssh","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.0~20170825.94fa1e38-1ubuntu0.2"}]}],"versions":["0.7.5-1","0.8.0~20170825.94fa1e38-1","0.8.0~20170825.94fa1e38-1build1","0.8.0~20170825.94fa1e38-1ubuntu0.1"]}],"references":[{"url":"https://ubuntu.com/security/notices/USN-3795-3","tags":["advisory"]},{"url":"https://launchpad.net/bugs/1805348","tags":["report"]}],"sources":{"osv":[{"id":"USN-3795-3","title":"libssh regression","description":"USN-3795-1 and USN-3795-2 fixed a vulnerability in libssh. The upstream\nfix introduced a regression. This update fixes the problem.\n\nOriginal advisory details:\n\n Peter Winter-Smith discovered that libssh incorrectly handled\n authentication when being used as a server. A remote attacker could use\n this issue to bypass authentication without any credentials.\n","status":"published","published":"2018-11-29T14:42:17Z","modified":"2026-04-22T09:51:35.286025Z","updated_at":"2026-11-02T16:58:14.019824Z"}]}}