{"id":"CVE-2020-20277","details":"There are multiple unauthenticated directory traversal vulnerabilities in different FTP commands in uftpd FTP server versions 2.7 to 2.10 due to improper implementation of a chroot jail in common.c's compose_abspath function that can be abused to read or write to arbitrary files on the filesystem, leak process memory, or potentially lead to remote code execution.","modified":"2026-07-08T12:44:28.177935Z","published":"2020-12-18T19:15:14.110Z","references":[{"type":"ADVISORY","url":"https://arinerron.com/blog/posts/6"},{"type":"FIX","url":"https://github.com/troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fe"},{"type":"EVIDENCE","url":"http://packetstormsecurity.com/files/167908/uftpd-2.10-Directory-Traversal.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/troglobit/uftpd","events":[{"introduced":"b9c4a6fcb41427e1b3468141609173a41be6d947"},{"last_affected":"e82248683ed7d53be1e01526f7b2a53dde545ef9"},{"fixed":"455b47d3756aed162d2d0ef7f40b549f3b5b30fe"}],"database_specific":{"cpe":"cpe:2.3:a:troglobit:uftpd:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"2.7"},{"last_affected":"2.10"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["v2.10","v2.9","v2.8","v2.7"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-20277.json","vanir_signatures_modified":"2026-07-08T12:44:28Z","vanir_signatures":[{"deprecated":false,"digest":{"line_hashes":["108229206972147259569248804372767412868","276360762841382069748424337075868013451","242312807191981524080516238265272007214","250357959569044888915036652998736230067"],"threshold":0.9},"id":"CVE-2020-20277-6bb940c7","signature_type":"Line","signature_version":"v1","source":"https://github.com/troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fe","target":{"file":"src/common.c"}}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}