jwt-go before 4.0.0-preview1 allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check.
CVE-2020-26160 - High Severity Vulnerability
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
jwt-go before 4.0.0-preview1 allows attackers to bypass intended access restrictions in situations with []string{} for m["aud"] (which is allowed by the specification). Because the type assertion fails, "" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check.
Publish Date: 2020-09-30
URL: CVE-2020-26160
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: High - Integrity Impact: None - Availability Impact: None
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: https://github.com/advisories/GHSA-w73w-5m7g-f7qc
Release Date: 2020-09-30
Fix Resolution: 4.0.0-preview1