CVE-2021-22100

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-03-25 · updated 2026-06-17
Weakness: CWE-400

Description

In cloud foundry CAPI versions prior to 1.122, a denial-of-service attack in which a developer can push a service broker that (accidentally or maliciously) causes CC instances to timeout and fail is possible. An attacker can leverage this vulnerability to cause an inability for anyone to push or manage apps.

Affected products

Cloud Foundry CAPI: before 1.122.0 — fixed in 1.122.0
Cloud Foundry cf-deployment: before 17.1.0 — fixed in 17.1.0

How to fix

Upgrade to a fixed version: Cloud Foundry CAPI 1.122.0; Cloud Foundry cf-deployment 17.1.0. Check the vendor advisory for mitigations.

References

https://www.cloudfoundry.org/blog/cve-2021-22100-cloud-controller-is-vulnerable-to-denial-of-service-due-to-misbehaving-service-brokers/
https://www.cloudfoundry.org/blog/cve-2021-22100-cloud-controller-is-vulnerable-to-denial-of-service-due-to-misbehaving-service-brokers/

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