CVE-2020-8554 in Kubernetes and Oracle Products
Published on January 21, 2021

Kubernetes man in the middle using LoadBalancer or ExternalIPs

Kubernetes API server in all versions allow an attacker who is able to create a ClusterIP service and set the spec.externalIPs field, to intercept traffic to that IP address. Additionally, an attacker who is able to patch the status (which is considered a privileged operation and should not typically be granted to users) of a LoadBalancer service can set the status.loadBalancer.ingress.ip to similar effect.

NVD

Vulnerability Analysis

CVE-2020-8554 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be low. considered to have a small impact on confidentiality and integrity and availability.

Attack Vector:

NETWORK

Attack Complexity:

LOW

Privileges Required:

LOW

User Interaction:

NONE

Scope:

UNCHANGED

Confidentiality Impact:

LOW

Integrity Impact:

LOW

Availability Impact:

LOW

Weakness Type

Unverified Ownership

The software does not properly verify that a critical resource is owned by the proper entity.

Products Associated with CVE-2020-8554

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Kubernetes

Oracle Communications Cloud Native Core Network Slice Selection Function

Oracle Communications Cloud Native Core Service Communication Proxy

Oracle Communications Cloud Native Core Policy

Affected Versions

Kubernetes Version Kubernetes all versions is affected by CVE-2020-8554

Exploit Probability

EPSS

30.41%

Percentile

96.58%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.