{"id":"CVE-2024-21671","aliases":["EUVD-2024-0170","GHSA-45gq-q4xh-cp53","PYSEC-2024-31","PYSEC-2026-2008"],"status":"published","title":"vantage6 username timing attack","description":"The vantage6 technology enables to manage and deploy privacy enhancing technologies like Federated Learning (FL) and Multi-Party Computation (MPC).  It is possible to find out usernames from the response time of login requests. This could aid attackers in credential attacks.  Version 4.2.0 patches this vulnerability.","severity":{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00401,"percentile":0.34654,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-203","CWE-208"],"published":"2024-01-30T15:43:06Z","modified":"2026-10-28T02:30:23Z","fixes":[{"ecosystem":"PyPI","package":"vantage6-server","fixed_in":["4.2.0"],"sources":["ghsa","osv"]},{"ecosystem":"PyPI","package":"vantage6","fixed_in":["4.2.0"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"vantage6-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.0"}]}]},{"source":"osv","ecosystem":"PyPI","package":"vantage6-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.0"}]}],"versions":["0.0.0","0.0.0b0","0.0.0b1","0.0.0b3","1.0.0","1.0.0b11","1.0.0b12","1.0.0b13","1.0.0b14","1.0.0b2","1.0.0b3","1.0.0b4","1.0.0b5","1.0.0b6","1.0.0b7","1.0.0b8","1.0.0b9","1.0.1","1.2.0","1.2.1","1.2.2","1.2.3","1.2.3.post1","2.0.0","2.0.0.post1","2.0.0a1","2.0.0a2","2.0.0a3","2.0.1rc1","2.0.1rc2","2.1.0","2.1.0rc1","2.1.1","2.1.2","2.1.3b1","2.1.3b2","2.1.3b3","2.1.3b4","2.2.0","2.2.0b1","2.2.0b2","2.2.0b3","2.2.0b4","2.2.1","2.2.10","2.2.11","2.2.12","2.2.2","2.2.3","2.2.4","2.2.5","2.2.6","2.2.7","2.2.8","2.2.9","2.3.0","2.3.0rc1","2.3.0rc2","2.3.0rc3","2.3.0rc4","2.3.0rc5","2.3.1","2.3.2","2.3.2rc1","2.3.3","2.3.4","2.3.5","2.3.5b1","3.0.0","3.0.0b1","3.0.0b3","3.0.0b4","3.0.0b5","3.0.0b6","3.0.0b7","3.0.0b8","3.0.0rc1","3.0.1","3.0.2","3.0.3","3.0.4","3.1.0","3.1.0rc1","3.1.0rc5","3.1.0rc6","3.1.0rc7","3.1.0rc8","3.1.0rc9","3.1.1rc1","3.1.1rc2","3.10.0","3.10.0rc1","3.10.1","3.10.3","3.10.4","3.11.0","3.11.0rc1","3.11.0rc2","3.11.0rc3","3.11.1","3.2.0","3.2.0rc1","3.2.0rc2","3.2.0rc3","3.2.0rc4","3.2.0rc5","3.3.0","3.3.0a0","3.3.0rc1","3.3.0rc2","3.3.0rc3","3.3.0rc4","3.3.1","3.3.2","3.3.3","3.3.4","3.3.5","3.3.6","3.3.7","3.3.7a2","3.3.7a3","3.3.8a1","3.3.8a2","3.3.8a4","3.3.8a5","3.3.8a6","3.3.8a7","3.3.8a8","3.4.0","3.4.0a1","3.4.0a2","3.4.0a3","3.4.0a6","3.4.1","3.4.1a0","3.4.1a1","3.4.1a2","3.4.1a3","3.4.2","3.4.2a0","3.4.3","3.5.0","3.5.0rc1","3.5.0rc2","3.5.0rc3","3.5.1","3.5.2","3.6.0","3.6.1","3.6.1rc1","3.6.1rc2","3.6.1rc3","3.7.0","3.7.0rc1","3.7.0rc2","3.7.1","3.7.2","3.7.3","3.8.0","3.8.0rc3","3.8.1","3.8.2","3.8.2rc1","3.8.3","3.8.4","3.8.5","3.8.6","3.8.7","3.8.7rc1","3.8.8","3.8.8rc1","3.8.8rc2","3.8.8rc3","3.9.0","3.9.0rc2","3.9.0rc4","4.0.0","4.0.0a10","4.0.0a2","4.0.0a3","4.0.0a4","4.0.0a5","4.0.0a6","4.0.0a7","4.0.0a8","4.0.0a9","4.0.1","4.0.1rc2","4.0.2","4.0.3","4.1.0","4.1.0b0","4.1.0b1","4.1.0rc0","4.1.1","4.1.2","4.1.3","4.2.0rc1","4.2.0rc2"]},{"source":"osv","ecosystem":"PyPI","package":"vantage6","ranges":[{"type":"GIT","events":[{"introduced":"0"},{"fixed":"389f416c445da4f2438c72f34c3b1084485c4e30"}]},{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.0"}]}],"versions":["0.0.0","0.0.0b0","0.0.0b1","0.0.0b3","1.0.0","1.0.0a1","1.0.0a2","1.0.0b10","1.0.0b11","1.0.0b12","1.0.0b13","1.0.0b14","1.0.0b2","1.0.0b3","1.0.0b4","1.0.0b5","1.0.0b6","1.0.0b7","1.0.0b8","1.0.0b9","1.1.0","1.1.0rc1","1.1.0rc2","1.2.0","1.2.1","1.2.2","1.2.3","1.2.3.post2","2.0.0","2.0.0.post1","2.0.0a1","2.0.0a2","2.0.0a3","2.0.1rc1","2.0.1rc2","2.1.0","2.1.0rc1","2.1.1","2.2.0","2.2.0b1","2.2.0b2","2.2.0b3","2.2.0b4","2.2.1","2.2.10","2.2.11","2.2.12","2.2.2","2.2.3","2.2.4","2.2.5","2.2.6","2.2.7","2.2.8","2.2.9","2.3.0","2.3.0rc1","2.3.0rc2","2.3.0rc3","2.3.0rc4","2.3.0rc5","2.3.1","2.3.2","2.3.2rc1","2.3.3","2.3.4","2.3.5","2.3.5b1","3.0.0","3.0.0b1","3.0.0b2","3.0.0b3","3.0.0b4","3.0.0b5","3.0.0b6","3.0.0b7","3.0.0b8","3.0.0rc1","3.0.1","3.0.2","3.0.3","3.0.4","3.1.0","3.1.0rc1","3.1.0rc5","3.1.0rc6","3.1.0rc7","3.1.0rc8","3.1.0rc9","3.1.1rc1","3.1.1rc2","3.10.0","3.10.0rc1","3.10.1","3.10.3","3.10.4","3.11.0","3.11.0rc1","3.11.0rc2","3.11.0rc3","3.11.1","3.2.0","3.2.0rc1","3.2.0rc2","3.2.0rc3","3.2.0rc4","3.2.0rc5","3.3.0","3.3.0a0","3.3.0rc1","3.3.0rc2","3.3.0rc3","3.3.0rc4","3.3.1","3.3.2","3.3.3","3.3.4","3.3.5","3.3.6","3.3.7","3.3.7a2","3.3.7a3","3.3.8a1","3.3.8a2","3.3.8a4","3.3.8a5","3.3.8a6","3.3.8a7","3.3.8a8","3.4.0","3.4.0a1","3.4.0a2","3.4.0a3","3.4.0a6","3.4.1","3.4.1a0","3.4.1a1","3.4.1a2","3.4.1a3","3.4.2","3.4.2a0","3.4.3","3.5.0","3.5.0rc1","3.5.0rc2","3.5.0rc3","3.5.1","3.5.2","3.6.0","3.6.1","3.6.1rc1","3.6.1rc2","3.6.1rc3","3.7.0","3.7.0rc1","3.7.0rc2","3.7.1","3.7.2","3.7.3","3.8.0","3.8.0rc3","3.8.1","3.8.2","3.8.2rc1","3.8.3","3.8.4","3.8.5","3.8.6","3.8.7","3.8.7rc1","3.8.8","3.8.8rc1","3.8.8rc2","3.8.8rc3","3.9.0","3.9.0rc2","3.9.0rc4","4.0.0","4.0.0a10","4.0.0a2","4.0.0a3","4.0.0a4","4.0.0a5","4.0.0a6","4.0.0a7","4.0.0a8","4.0.0a9","4.0.1","4.0.1rc2","4.0.2","4.0.3","4.1.0","4.1.0b0","4.1.0b1","4.1.0rc0","4.1.1","4.1.2","4.1.3","4.2.0rc1","4.2.0rc2"]},{"source":"osv","ecosystem":"PyPI","package":"vantage6-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.0"}]}],"versions":["0.0.0","0.0.0b0","0.0.0b1","0.0.0b3","1.0.0","1.0.0b11","1.0.0b12","1.0.0b13","1.0.0b14","1.0.0b2","1.0.0b3","1.0.0b4","1.0.0b5","1.0.0b6","1.0.0b7","1.0.0b8","1.0.0b9","1.0.1","1.2.0","1.2.1","1.2.2","1.2.3","1.2.3.post1","2.0.0","2.0.0.post1","2.0.0a1","2.0.0a2","2.0.0a3","2.0.1rc1","2.0.1rc2","2.1.0","2.1.0rc1","2.1.1","2.1.2","2.1.3b1","2.1.3b2","2.1.3b3","2.1.3b4","2.2.0","2.2.0b1","2.2.0b2","2.2.0b3","2.2.0b4","2.2.1","2.2.10","2.2.11","2.2.12","2.2.2","2.2.3","2.2.4","2.2.5","2.2.6","2.2.7","2.2.8","2.2.9","2.3.0","2.3.0rc1","2.3.0rc2","2.3.0rc3","2.3.0rc4","2.3.0rc5","2.3.1","2.3.2","2.3.2rc1","2.3.3","2.3.4","2.3.5","2.3.5b1","3.0.0","3.0.0b1","3.0.0b3","3.0.0b4","3.0.0b5","3.0.0b6","3.0.0b7","3.0.0b8","3.0.0rc1","3.0.1","3.0.2","3.0.3","3.0.4","3.1.0","3.1.0rc1","3.1.0rc5","3.1.0rc6","3.1.0rc7","3.1.0rc8","3.1.0rc9","3.1.1rc1","3.1.1rc2","3.10.0","3.10.0rc1","3.10.1","3.10.3","3.10.4","3.11.0","3.11.0rc1","3.11.0rc2","3.11.0rc3","3.11.1","3.2.0","3.2.0rc1","3.2.0rc2","3.2.0rc3","3.2.0rc4","3.2.0rc5","3.3.0","3.3.0a0","3.3.0rc1","3.3.0rc2","3.3.0rc3","3.3.0rc4","3.3.1","3.3.2","3.3.3","3.3.4","3.3.5","3.3.6","3.3.7","3.3.7a2","3.3.7a3","3.3.8a1","3.3.8a2","3.3.8a4","3.3.8a5","3.3.8a6","3.3.8a7","3.3.8a8","3.4.0","3.4.0a1","3.4.0a2","3.4.0a3","3.4.0a6","3.4.1","3.4.1a0","3.4.1a1","3.4.1a2","3.4.1a3","3.4.2","3.4.2a0","3.4.3","3.5.0","3.5.0rc1","3.5.0rc2","3.5.0rc3","3.5.1","3.5.2","3.6.0","3.6.1","3.6.1rc1","3.6.1rc2","3.6.1rc3","3.7.0","3.7.0rc1","3.7.0rc2","3.7.1","3.7.2","3.7.3","3.8.0","3.8.0rc3","3.8.1","3.8.2","3.8.2rc1","3.8.3","3.8.4","3.8.5","3.8.6","3.8.7","3.8.7rc1","3.8.8","3.8.8rc1","3.8.8rc2","3.8.8rc3","3.9.0","3.9.0rc2","3.9.0rc4","4.0.0","4.0.0a10","4.0.0a2","4.0.0a3","4.0.0a4","4.0.0a5","4.0.0a6","4.0.0a7","4.0.0a8","4.0.0a9","4.0.1","4.0.1rc2","4.0.2","4.0.3","4.1.0","4.1.0b0","4.1.0b1","4.1.0rc0","4.1.1","4.1.2","4.1.3","4.2.0rc1","4.2.0rc2"]}],"products":[{"vendor":"vantage6","product":"vantage6"}],"references":[{"url":"https://github.com/vantage6/vantage6/security/advisories/GHSA-45gq-q4xh-cp53","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","web"]},{"url":"https://github.com/vantage6/vantage6/commit/389f416c445da4f2438c72f34c3b1084485c4e30","tags":["x_refsource_MISC","x_transferred","Patch","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-21671","tags":["advisory"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/vantage6/PYSEC-2024-31.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-45gq-q4xh-cp53","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/21xxx/CVE-2024-21671.json","tags":["advisory"]},{"url":"https://github.com/vantage6/vantage6","tags":["package"]},{"url":"https://pypi.org/project/vantage6-server","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2024-21671","title":"vantage6 username timing attack","description":"The vantage6 technology enables to manage and deploy privacy enhancing technologies like Federated Learning (FL) and Multi-Party Computation (MPC).  It is possible to find out usernames from the response time of login requests. This could aid attackers in credential attacks.  Version 4.2.0 patches this vulnerability.","status":"published","published":"2024-01-30T15:43:06.789Z","modified":"2024-10-17T18:01:07.74Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"cna"}],"cwes":["CWE-208"],"updated_at":"2026-11-02T14:34:05.077718Z"}],"euvd":[{"id":"EUVD-2024-0170","description":"The vantage6 technology enables to manage and deploy privacy enhancing technologies like Federated Learning (FL) and Multi-Party Computation (MPC).  It is possible to find out usernames from the response time of login requests. This could aid attackers in credential attacks.  Version 4.2.0 patches this vulnerability.","status":"published","published":"2024-01-30T15:43:06Z","modified":"2024-10-17T18:01:07Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-03T00:27:33.799805Z"}],"ghsa":[{"id":"GHSA-45gq-q4xh-cp53","title":"vantage6 vulnerable to username timing attack","description":"### Impact\nIt is possible to find out usernames from the response time of login requests. This could aid attackers in credential attacks\n\n### Workarounds\nNo\n","status":"published","published":"2024-01-30T20:56:48Z","modified":"2024-02-08T22:48:59Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-208"],"updated_at":"2026-11-02T14:37:36.777238Z"}],"nvd":[{"id":"CVE-2024-21671","description":"The vantage6 technology enables to manage and deploy privacy enhancing technologies like Federated Learning (FL) and Multi-Party Computation (MPC).  It is possible to find out usernames from the response time of login requests. This could aid attackers in credential attacks.  Version 4.2.0 patches this vulnerability.","status":"published","published":"2024-01-30T16:15:48.09Z","modified":"2026-06-17T07:09:57.83Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"secondary"},{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-208","CWE-203"],"updated_at":"2026-11-02T14:09:34.891666Z"}],"osv":[{"id":"CVE-2024-21671","title":"vantage6 username timing attack","description":"The vantage6 technology enables to manage and deploy privacy enhancing technologies like Federated Learning (FL) and Multi-Party Computation (MPC).  It is possible to find out usernames from the response time of login requests. This could aid attackers in credential attacks.  Version 4.2.0 patches this vulnerability.","status":"published","published":"2024-01-30T15:43:06.789Z","modified":"2026-10-28T02:30:23.045126825Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-208"],"updated_at":"2026-11-02T15:44:38.577405Z"},{"id":"GHSA-45gq-q4xh-cp53","title":"vantage6 vulnerable to username timing attack","description":"### Impact\nIt is possible to find out usernames from the response time of login requests. This could aid attackers in credential attacks\n\n### Workarounds\nNo\n","status":"published","published":"2024-01-30T20:56:48Z","modified":"2026-07-07T17:57:01.554426828Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-208"],"updated_at":"2026-11-02T15:46:36.434231Z"},{"id":"PYSEC-2024-31","description":"The vantage6 technology enables to manage and deploy privacy enhancing technologies like Federated Learning (FL) and Multi-Party Computation (MPC).  It is possible to find out usernames from the response time of login requests. This could aid attackers in credential attacks.  Version 4.2.0 patches this vulnerability.","status":"published","published":"2024-01-30T16:15:00Z","modified":"2026-07-07T17:57:01.554426828Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-02T15:52:54.242332Z"},{"id":"PYSEC-2026-2008","title":"vantage6 vulnerable to username timing attack","description":"### Impact\nIt is possible to find out usernames from the response time of login requests. This could aid attackers in credential attacks\n\n### Workarounds\nNo\n","status":"published","published":"2026-07-07T11:45:31.678545Z","modified":"2026-07-07T17:57:01.554426828Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-02T15:52:55.537808Z"}]}}