{"id":"UBUNTU-CVE-2015-3644","details":"Stunnel 5.00 through 5.13, when using the redirect option, does not redirect client connections to the expected server after the initial connection, which allows remote attackers to bypass authentication.","modified":"2025-07-16T07:32:56.527991Z","published":"2015-05-14T00:59:00Z","withdrawn":"2025-07-18T16:43:13Z","upstream":["CVE-2015-3644"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-3644"},{"type":"REPORT","url":"https://www.stunnel.org/CVE-2015-3644.html"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2015-3644"}],"affected":[{"package":{"name":"stunnel4","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/stunnel4@3:5.18-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3:5.18-1"}]}],"ecosystem_specific":{"binaries":[{"binary_version":"3:5.18-1","binary_name":"stunnel4"},{"binary_version":"3:5.18-1","binary_name":"stunnel4-dbgsym"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2015/UBUNTU-CVE-2015-3644.json"}}],"schema_version":"1.7.3","severity":[{"type":"Ubuntu","score":"medium"}]}