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TI-2021-02819 Aliases CVE-2021-3909GHSA-8cvr-4rrf-f244

Infinite open connection causes OctoRPKI to hang forever

Priority LOW 36CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-400.

Summary

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.

Why it matters now

EPSS 0.01575 75th percentileScored 2026-11-07
Fix Fixed octorpki (Cloudflare): 1.4.0github.com/cloudflare/cfrpki (Go): 1.4.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Cloudflareoctorpkibefore 1.4.01.4.0Patch availableCNA
—github.com/cloudflare/cfrpki (Go)before 1.4.01.4.0Patch availableGHSA-8cvr-4rrf-f244
  • octorpki VendorCloudflare Affected before 1.4.0 Fixed in 1.4.0 Patch available CNA
  • github.com/cloudflare/cfrpki (Go) Vendor— Affected before 1.4.0 Fixed in 1.4.0 Patch available GHSA-8cvr-4rrf-f244

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:cloudflare:octorpki:*:*:*:*:*:*:*:*before 1.3.0VulnerableCloudflare
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
  • cpe:2.3:a:cloudflare:octorpki:*:*:*:*:*:*:*:* Versions before 1.3.0 Vulnerable ·Cloudflare
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian

Remediation

  • Fix · CNA octorpki (Cloudflare) Fixed in 1.4.0
  • Fix · GHSA-8cvr-4rrf-f244 github.com/cloudflare/cfrpki (Go) Fixed in 1.4.0 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Cloudflare octorpki — DSA-5033

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2021-02817 Arbitrary filepath traversal via URI injectionPriority MEDIUM 49
    Show all 2 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-3909
  2. 2026-10-03 Alias added: GHSA-8cvr-4rrf-f244

References

Advisory 4

Other 2

  • TI-2021-02817 Arbitrary filepath traversal via URI injection CVSS 3.1CRITICAL 9.8
  • TI-2021-02820 NUL character in ROA causes OctoRPKI to crash CVSS 3.1HIGH 7.5
  • TI-2021-02693 OctoRPKI lacks contextual out-of-bounds check when validating RPKI ROA maxLength values CVSS 3.1HIGH 7.5
  • TI-2021-02875 Improper Preservation of Permissions in github.com/cloudflare/cfrpki/cmd/octorpki CVSS 3.1HIGH 7.5
  • TI-2021-02818 Infinite certificate chain depth results in OctoRPKI running forever CVSS 3.1HIGH 7.5
  • TI-2022-03327 OctoRPKI crash when maximum iterations number is reached CVSS 3.1HIGH 7.5
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences