Denial of service in Cloud Foundry Cloud Controller (CAPI)

1) Resource exhaustion

EUVDB-ID: #VU58173

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-22101

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can trigger resource exhaustion by using REST HTTP requests with label_selectors on multiple V3 endpoints by generating an enormous SQL query.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cloud Controller: 1.0.0 - 1.117.0

External links

http://www.cloudfoundry.org/blog/cve-2021-22101-cloud-controller-is-vulnerable-to-unauthenticated-denial-of-service/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.