Multiple vulnerabilities in Kubernetes

Published: 2020-03-31

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-8551 CVE-2020-8552
CWE-ID	CWE-789
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 information about 2 vulnerabilities.

1) Uncontrolled Memory Allocation

EUVDB-ID: #VU26473

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8551

CWE-ID: CWE-789 - Uncontrolled Memory Allocation

Exploit availability: No

Description

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

The vulnerability exists in the Kubelet component due to improper allocation of memory in the kubelet API, including the unauthenticated HTTP read-only API typically served on port 10255, and the authenticated HTTPS API typically served on port 10250. A remote attacker on the local network can cause a denial of service condition on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Kubernetes: 1.15.0 - 1.17.2

External links

http://github.com/kubernetes/kubernetes/issues/89377
http://groups.google.com/forum/#!topic/kubernetes-security-announce/2UOlsba2g0s

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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

2) Uncontrolled Memory Allocation

EUVDB-ID: #VU26474

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8552