SB2020033111 - Multiple vulnerabilities in Kubernetes

Description

This security bulletin contains information about 2 vulnerabilities.

1) Uncontrolled Memory Allocation (CVE-ID: CVE-2020-8551)

CWE-ID: CWE-789 - Uncontrolled Memory Allocation

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

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.

2) Uncontrolled Memory Allocation (CVE-ID: CVE-2020-8552)

CWE-ID: CWE-789 - Uncontrolled Memory Allocation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

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

The vulnerability exists in the Kubernetes API server component due to improper allocation of memory. A remote attacker can send a specially crafted API request and cause a denial of service condition on the target system.

Remediation

Install update from vendor's website.

References

• https://github.com/kubernetes/kubernetes/issues/89377
• https://groups.google.com/forum/#!topic/kubernetes-security-announce/2UOlsba2g0s
• https://github.com/kubernetes/kubernetes/issues/89378