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CVE-2021-3909

MEDIUM
Published 2021-11-11T21:45:19.611444Z
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CVSS Score

V3.1
4.4
/10
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.007
probability
of exploitation in the wild

There is a 0.7% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.718
Higher than 71.8% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
NONE
Integrity
NONE
Availability
HIGH

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Cloudflare

octorpki

Affected Versions:

unspecified

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed MODERATE

Infinite open connection causes OctoRPKI to hang forever

GHSA-8cvr-4rrf-f244

Advisory 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. ## Patches ## For more information If you have any questions or comments about this advisory email us at [email protected]

Affected Packages

Go github.com/cloudflare/cfrpki
ECOSYSTEM: ≥0 <1.4.0

CVSS Scoring

CVSS Score

5.0

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

References

WEB https://github.com/cloudflare/cfrpki/security/advisories/GHSA-8cvr-4rrf-f244
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-3909
PACKAGE https://github.com/cloudflare/cfrpki
WEB https://github.com/cloudflare/cfrpki/releases/tag/v1.4.0
WEB https://www.debian.org/security/2021/dsa-5033
WEB https://www.debian.org/security/2022/dsa-5041

Advisory provided by GitHub Security Advisory Database. Published: November 10, 2021, Modified: October 2, 2023

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
Published: 2021-11-11T21:45:19.611444Z
Last Modified: 2024-09-16T23:06:15.208Z
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