{"id":"UBUNTU-CVE-2019-11366","details":"An issue was discovered in atftpd in atftp 0.7.1. It does not lock the thread_list_mutex mutex before assigning the current thread data structure. As a result, the daemon is vulnerable to a denial of service attack due to a NULL pointer dereference. If thread_data is NULL when assigned to current, and modified by another thread before a certain tftpd_list.c check, there is a crash when dereferencing current-\u003enext.","modified":"2026-02-04T03:28:01.051370Z","published":"2019-04-20T13:29:00Z","related":["USN-4540-1","USN-4643-1"],"upstream":["CVE-2019-11366"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-11366"},{"type":"REPORT","url":"https://pulsesecurity.co.nz/advisories/atftpd-multiple-vulnerabilities"},{"type":"REPORT","url":"https://sourceforge.net/p/atftp/code/ci/382f76a90b44f81fec00e2f609a94def4a5d3580/"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4540-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4643-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-11366"}],"affected":[{"package":{"name":"atftp","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/atftp@0.7.git20120829-3.1~0.16.04.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.git20120829-3.1~0.16.04.1"}]}],"versions":["0.7.git20120829-2.1"],"ecosystem_specific":{"binaries":[{"binary_name":"atftp","binary_version":"0.7.git20120829-3.1~0.16.04.1"},{"binary_name":"atftpd","binary_version":"0.7.git20120829-3.1~0.16.04.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-11366.json"}},{"package":{"name":"atftp","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/atftp@0.7.git20120829-3.1~0.18.04.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.git20120829-3.1~0.18.04.1"}]}],"versions":["0.7.git20120829-3"],"ecosystem_specific":{"binaries":[{"binary_name":"atftp","binary_version":"0.7.git20120829-3.1~0.18.04.1"},{"binary_name":"atftpd","binary_version":"0.7.git20120829-3.1~0.18.04.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-11366.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}