cloudflare octorpki CVE-2021-3908 in CloudFlare and Debian Products
Published on November 11, 2021

Infinite certificate chain depth results in OctoRPKI running forever

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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.

Github Repository Vendor Advisory NVD

Vulnerability Analysis

CVE-2021-3908 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
HIGH
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Weakness Type

What is a Resource Exhaustion Vulnerability?

The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

CVE-2021-3908 has been classified to as a Resource Exhaustion vulnerability or weakness.


Products Associated with CVE-2021-3908

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Affected Versions

Cloudflare octorpki:

Exploit Probability

EPSS
0.71%
Percentile
48.55%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.