{"cve":"CVE-2021-3909","nvd":{"published":"2021-11-11T22:15:07.923","modified":"2026-06-17T04:05:58.370","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400"],"references":["https://github.com/cloudflare/cfrpki/security/advisories/GHSA-8cvr-4rrf-f244","https://www.debian.org/security/2021/dsa-5033","https://www.debian.org/security/2022/dsa-5041","https://github.com/cloudflare/cfrpki/security/advisories/GHSA-8cvr-4rrf-f244","https://www.debian.org/security/2021/dsa-5033"],"products":["cloudflare:octorpki","debian:debian_linux"],"source":"nvd","synced_at":"2026-10-19T21:24:39.218183596+00:00"},"epss":{"cve":"CVE-2021-3909","score":0.01575,"percentile":0.7545,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-8cvr-4rrf-f244","url":"https://osv.dev/vulnerability/GHSA-8cvr-4rrf-f244","summary":"Infinite open connection causes OctoRPKI to hang forever","modified":"2026-07-08T06:28:03.578101407Z","packages":[{"ecosystem":"Go","name":"github.com/cloudflare/cfrpki","purl":"pkg:golang/github.com/cloudflare/cfrpki","ranges":["<1.4.0"],"fixed":["1.4.0"]}]},{"id":"GO-2022-0250","url":"https://osv.dev/vulnerability/GO-2022-0250","summary":"Infinite open connection causes OctoRPKI to hang forever in github.com/cloudflare/cfrpki","modified":"2026-03-03T04:52:04.314826Z","packages":[{"ecosystem":"Go","name":"github.com/cloudflare/cfrpki","purl":"pkg:golang/github.com/cloudflare/cfrpki","ranges":["<1.4.0"],"fixed":["1.4.0"]}]}],"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."]}