CVE-2020-15136 (Medium) detected in github.com/etcd-io/etcd-v3.4.3

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CVE-2020-15136 - Medium Severity Vulnerability

Vulnerable Library - github.com/etcd-io/etcd-v3.4.3

Distributed reliable key-value store for the most critical data of a distributed system

Dependency Hierarchy: - k8s.io/kubernetes/cmd/cloud-controller-manager/app-v1.18.2-k3s.1 (Root Library) - k8s.io/apiserver/pkg/server/options-20f496186c3e8e4d4f12da0794f26cec36df73b2 - k8s.io/apiserver/pkg/registry/generic-20f496186c3e8e4d4f12da0794f26cec36df73b2 - github.com/kubernetes/apiserver/pkg/storage-99350e274cedfff11c934b3371447873d98caba6 - :x: **github.com/etcd-io/etcd-v3.4.3** (Vulnerable Library)

Found in HEAD commit: d176fc163fbd69f1a628cf9b7ea217423ee02d31

Found in base branch: master

Vulnerability Details

In ectd before versions 3.4.10 and 3.3.23, gateway TLS authentication is only applied to endpoints detected in DNS SRV records. When starting a gateway, TLS authentication will only be attempted on endpoints identified in DNS SRV records for a given domain, which occurs in the discoverEndpoints function. No authentication is performed against endpoints provided in the --endpoints flag. This has been fixed in versions 3.4.10 and 3.3.23 with improved documentation and deprecation of the functionality.

Publish Date: 2020-08-06

URL: CVE-2020-15136

CVSS 3 Score Details (6.5)

Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: High - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: High - Integrity Impact: Low - Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Release Date: 2020-08-06

Fix Resolution: 3.4.10, 3.3.23