{"id":"CVE-2021-3909","aliases":["GHSA-8cvr-4rrf-f244","GO-2022-0250"],"title":"Infinite open connection causes OctoRPKI to hang forever","summary":"Infinite open connection causes OctoRPKI to hang forever","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","vendor":"cloudflare","product":"github.com/cloudflare/cfrpki","ecosystem":"go","affected":["github.com/cloudflare/cfrpki < 1.4.0"],"patched":["github.com/cloudflare/cfrpki 1.4.0"],"published":"2021-11-10","updated":"2026-07-08","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-8cvr-4rrf-f244","references":[{"url":"https://github.com/cloudflare/cfrpki/security/advisories/GHSA-8cvr-4rrf-f244"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3909"},{"url":"https://github.com/cloudflare/cfrpki"},{"url":"https://github.com/cloudflare/cfrpki/releases/tag/v1.4.0"},{"url":"https://www.debian.org/security/2021/dsa-5033"},{"url":"https://www.debian.org/security/2022/dsa-5041"}],"tags":["osv","go"],"epss":0.01562,"epssPercentile":0.7416,"ingestedAt":"2026-07-09T18:56:36.221Z","slug":"CVE-2021-3909","body":"## Overview\n\nOctoRPKI (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\n\n## Affected packages\n\n- `github.com/cloudflare/cfrpki < 1.4.0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `github.com/cloudflare/cfrpki 1.4.0`","depth":"sunlit","depthScore":25,"depthScoreParts":{"impact":24.2,"likelihood":0.3,"exploitation":0,"ransomware":0},"changes":[]}