#VU48746 Input validation error in Cloud Controller and CF Deployment - CVE-2020-5423

Vulnerability identifier: #VU48746

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-5423

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cloud Controller
Web applications / Modules and components for CMS
CF Deployment
Server applications / Frameworks for developing and running applications

Vendor: Cloud Foundry Foundation

Description

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

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send specially crafted YAML files to certain endpoints and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cloud Controller: before 1.101.0

CF Deployment: 13.0.0 - 14.0.0

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External links
https://www.cloudfoundry.org/blog/cve-2020-5423

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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.