{"id":"CVE-2020-5204","aliases":["EUVD-2020-26447","GHSA-4g9j-24m6-cjw4","GHSA-wrpr-xw7q-9wvq","openSUSE-SU-2020:0069-1"],"status":"published","title":"Buffer overflow vulnerability in uftpd","description":"In uftpd before 2.11, there is a buffer overflow vulnerability in handle_PORT in ftpcmd.c that is caused by a buffer that is 16 bytes large being filled via sprintf() with user input based on the format specifier string %d.%d.%d.%d. The 16 byte size is correct for valid IPv4 addresses (len(\u0026#39;255.255.255.255\u0026#39;) == 16), but the format specifier %d allows more than 3 digits. This has been fixed in version 2.11","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01079,"percentile":0.65303,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-120","CWE-121"],"published":"2020-01-06T19:10:12Z","modified":"2026-10-20T13:59:41Z","fixes":[{"ecosystem":"openSUSE:Leap 15.1","package":"uftpd","fixed_in":["2.11-lp151.2.3.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"openSUSE:Leap 15.1","package":"uftpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.11-lp151.2.3.1"}]}]}],"products":[{"vendor":"troglobit","product":"uftpd"}],"references":[{"url":"https://github.com/troglobit/uftpd/security/advisories/GHSA-wrpr-xw7q-9wvq","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://github.com/troglobit/uftpd/commit/0fb2c031ce0ace07cc19cd2cb2143c4b5a63c9dd","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00034.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-5204"},{"url":"https://github.com/advisories/GHSA-4g9j-24m6-cjw4"},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/IDYGZ633D4H5UECALITDGXDPUI2GPPSA/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1160199","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2020-5204","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2020-5204","title":"Buffer overflow vulnerability in uftpd","description":"In uftpd before 2.11, there is a buffer overflow vulnerability in handle_PORT in ftpcmd.c that is caused by a buffer that is 16 bytes large being filled via sprintf() with user input based on the format specifier string %d.%d.%d.%d. The 16 byte size is correct for valid IPv4 addresses (len(\u0026#39;255.255.255.255\u0026#39;) == 16), but the format specifier %d allows more than 3 digits. This has been fixed in version 2.11","status":"published","published":"2020-01-06T19:10:12Z","modified":"2024-08-04T08:22:08.699Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:35:47.56691Z"}],"euvd":[{"id":"EUVD-2020-26447","description":"In uftpd before 2.11, there is a buffer overflow vulnerability in handle_PORT in ftpcmd.c that is caused by a buffer that is 16 bytes large being filled via sprintf() with user input based on the format specifier string %d.%d.%d.%d. The 16 byte size is correct for valid IPv4 addresses (len(\u0026#39;255.255.255.255\u0026#39;) == 16), but the format specifier %d allows more than 3 digits. This has been fixed in version 2.11","status":"published","published":"2020-01-06T19:10:12Z","modified":"2024-08-04T08:22:08Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-03T03:08:07.28588Z"}],"ghsa":[{"id":"GHSA-4g9j-24m6-cjw4","title":"In uftpd before 2.11, there is a buffer overflow vulnerability in handle_PORT in ftpcmd.c that is...","description":"In uftpd before 2.11, there is a buffer overflow vulnerability in handle_PORT in ftpcmd.c that is caused by a buffer that is 16 bytes large being filled via sprintf() with user input based on the format specifier string %d.%d.%d.%d. The 16 byte size is correct for valid IPv4 addresses (len(\u0026#39;255.255.255.255\u0026#39;) == 16), but the format specifier %d allows more than 3 digits. This has been fixed in version 2.11","status":"published","published":"2022-05-24T17:05:41Z","modified":"2023-01-29T05:00:58Z","updated_at":"2026-11-02T14:44:42.615019Z"}],"nvd":[{"id":"CVE-2020-5204","description":"In uftpd before 2.11, there is a buffer overflow vulnerability in handle_PORT in ftpcmd.c that is caused by a buffer that is 16 bytes large being filled via sprintf() with user input based on the format specifier string %d.%d.%d.%d. The 16 byte size is correct for valid IPv4 addresses (len(\u0026#39;255.255.255.255\u0026#39;) == 16), but the format specifier %d allows more than 3 digits. This has been fixed in version 2.11","status":"published","published":"2020-01-06T20:15:12.523Z","modified":"2026-06-17T03:21:01.16Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-121","CWE-120"],"updated_at":"2026-11-02T14:05:52.385274Z"}],"osv":[{"id":"CVE-2020-5204","description":"In uftpd before 2.11, there is a buffer overflow vulnerability in handle_PORT in ftpcmd.c that is caused by a buffer that is 16 bytes large being filled via sprintf() with user input based on the format specifier string %d.%d.%d.%d. The 16 byte size is correct for valid IPv4 addresses (len(\u0026#39;255.255.255.255\u0026#39;) == 16), but the format specifier %d allows more than 3 digits. This has been fixed in version 2.11","status":"published","published":"2020-01-06T20:15:12.523Z","modified":"2026-10-20T13:59:41.401353193Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:16.936975Z"},{"id":"openSUSE-SU-2020:0069-1","title":"Security update for uftpd","description":"This update for uftpd to version 2.11 fixes the following issues:\n\n- CVE-2020-5204: Fixed a buffer overflow in FTP PORT parser (boo#1160199).\n- Fixed additional bugs which could have security implications.\n","status":"published","published":"2020-01-18T13:10:54Z","modified":"2026-02-04T03:10:16.330386Z","updated_at":"2026-11-02T16:58:31.152112Z"}]}}