CVE-2021-3908

Infinite certificate chain depth results in OctoRPKI running 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 depth of a certificate chain, allowing for a CA to create children in an ad-hoc fashion, thereby making tree traversal never end.

OctoRPKI no limita la profundidad de una cadena de certificados, permitiendo que una CA cree hijos de forma ad-hoc, haciendo que el recorrido del árbol nunca termine

*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

None

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
CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

CAPEC

References (2)

URL	Tag	Source
https://github.com/cloudflare/cfrpki/security/advisories/GHSA-g5gj-9ggf-9vmq	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.debian.org/security/2022/dsa-5041	2022-08-09

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