{"cve":"CVE-2023-29483","nvd":{"published":"2024-04-11T14:15:12.010","modified":"2026-06-17T05:50:09.647","status":"Modified","description":"eventlet before 0.35.2, as used in dnspython before 2.6.0, allows remote attackers to interfere with DNS name resolution by quickly sending an invalid packet from the expected IP address and source port, aka a \"TuDoor\" attack. In other words, dnspython does not have the preferred behavior in which the DNS name resolution algorithm would proceed, within the full time window, in order to wait for a valid packet. NOTE: dnspython 2.6.0 is unusable for a different reason that was addressed in 2.6.1.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H","score":7.0},"cwes":["CWE-292"],"references":["https://github.com/eventlet/eventlet/issues/913","https://github.com/eventlet/eventlet/releases/tag/v0.35.2","https://github.com/rthalley/dnspython/issues/1045","https://github.com/rthalley/dnspython/releases/tag/v2.6.0","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NLRKR57IFVKQC2GCXZBFLCLBAWBWL3F6/"],"products":["dnspython:dnspython","eventlet:eventlet","fedoraproject:fedora","netapp:bootstrap_os"],"source":"nvd","synced_at":"2026-10-19T21:48:32.179249784+00:00"},"epss":{"cve":"CVE-2023-29483","score":0.01857,"percentile":0.79205,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-3rq5-2g8h-59hc","url":"https://osv.dev/vulnerability/GHSA-3rq5-2g8h-59hc","summary":"Potential DoS via the Tudoor mechanism in eventlet and dnspython","modified":"2026-09-10T03:50:11.305148352Z","packages":[{"ecosystem":"PyPI","name":"eventlet","purl":"pkg:pypi/eventlet","ranges":["<0.35.2"],"fixed":["0.35.2"]},{"ecosystem":"PyPI","name":"dnspython","purl":"pkg:pypi/dnspython","ranges":["<2.6.1"],"fixed":["2.6.1"]}]},{"id":"PYSEC-2026-1307","url":"https://osv.dev/vulnerability/PYSEC-2026-1307","summary":"Potential DoS via the Tudoor mechanism in eventlet and dnspython","modified":"2026-07-13T16:42:52.437776766Z","packages":[{"ecosystem":"PyPI","name":"dnspython","purl":"pkg:pypi/dnspython","ranges":["<2.6.1"],"fixed":["2.6.1"]}]},{"id":"PYSEC-2026-2472","url":"https://osv.dev/vulnerability/PYSEC-2026-2472","summary":"Potential DoS via the Tudoor mechanism in eventlet and dnspython","modified":"2026-07-13T16:42:52.437776766Z","packages":[{"ecosystem":"PyPI","name":"eventlet","purl":"pkg:pypi/eventlet","ranges":["<0.35.2"],"fixed":["0.35.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}