CVE-2021-3909

Infinite open connection causes OctoRPKI to hang forever

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

OctoRPKI no limita la duración de una conexión, permitiendo que se produzca un ataque slowloris DOS que hace que OctoRPKI espere eternamente. En concreto, el repositorio al que OctoRPKI envía peticiones HTTP mantendrá la conexión abierta durante un día antes de que se devuelva una respuesta, pero sigue alimentando con nuevos bytes para mantener viva la conexión

*Credits: Koen van Hove

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-10-26 CVE Reserved
2021-11-11 CVE Published
2024-09-16 CVE Updated
2024-09-19 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption

CAPEC

References (3)

URL	Tag	Source
https://github.com/cloudflare/cfrpki/security/advisories/GHSA-8cvr-4rrf-f244	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.debian.org/security/2021/dsa-5033	2022-04-04
https://www.debian.org/security/2022/dsa-5041	2022-04-04

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cloudflare Search vendor "Cloudflare"		Octorpki Search vendor "Cloudflare" for product "Octorpki"				< 1.3.0 Search vendor "Cloudflare" for product "Octorpki" and version " < 1.3.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0"		-		Affected