Server-Side Request Forgery (SSRF) in Kubernetes



Published: 2020-06-05 | Updated: 2020-12-22
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-8555
CWE-ID CWE-918
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Kubernetes
Server applications / Frameworks for developing and running applications

Vendor Kubernetes

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Server-Side Request Forgery (SSRF)

EUVDB-ID: #VU30267

Risk: Medium

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8555

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

Exploit availability: No

Description

The vulnerability allows a remote authenticated user to gain access to sensitive information.

The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).

Mitigation

Install update from vendor's website.

Vulnerable software versions

Kubernetes: 1.17.0 - 1.17.4

CPE2.3 External links

http://www.openwall.com/lists/oss-security/2020/06/01/4
http://github.com/kubernetes/kubernetes/issues/91542
http://groups.google.com/d/topic/kubernetes-security-announce/kEK27tqqs30/discussion


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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



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