{"id":"CVE-2021-3909","aliases":["GHSA-8cvr-4rrf-f244","GO-2022-0250"],"url":"https://o3.security/vulnerability/CVE-2021-3909","summary":"Infinite open connection causes OctoRPKI to hang forever","details":"OctoRPKI (github.com/cloudflare/cfrpki/cmd/octorpki) does not limit the length of a connection, allowing for a slowloris DOS attack to take place which makes OctoRPKI wait forever. Specifically, the repository that OctoRPKI sends HTTP requests to will keep the connection open for a day before a response is returned, but does keep drip feeding new bytes to keep the connection alive.\n\n## Patches\n\n## For more information\nIf you have any questions or comments about this advisory email us at security@cloudflare.com\n","published":"2021-11-11T22:15:07.923Z","modified":"2026-07-08T06:29:28.991295776Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/cloudflare/cfrpki","fixedVersion":"1.4.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/cloudflare/cfrpki/security/advisories/GHSA-8cvr-4rrf-f244"},{"type":"ADVISORY","url":"https://www.debian.org/security/2021/dsa-5033"},{"type":"ADVISORY","url":"https://www.debian.org/security/2022/dsa-5041"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3909"},{"type":"PACKAGE","url":"https://github.com/cloudflare/cfrpki"},{"type":"WEB","url":"https://github.com/cloudflare/cfrpki/releases/tag/v1.4.0"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T06:29:28.991295776Z"}}