Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions when ext-authz extension is sending request headers to the external authorization service it must merge multiple value headers according to the HTTP spec. However, only the last header value is sent. This may allow specifically crafted requests to bypass authorization. Attackers may be able to escalate privileges when using ext-authz extension or back end service that uses multiple value headers for authorization. A specifically constructed request may be delivered by an untrusted downstream peer in the presence of ext-authz extension. Envoy versions 1.19.1, 1.18.4, 1.17.4, 1.16.5 contain fixes to the ext-authz extension to correctly merge multiple request header values, when sending request for authorization.
CVSS Details
- CVSS 3.1 Base Score: 8.6
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Oracle_linux | — | Upgrade kubeletUpgrade olcne-nginxUpgrade olcne-grafana-chartUpgrade istio-pilot-agentUpgrade istio-pilot-discoveryUpgrade olcne-utilsUpgrade istioUpgrade olcne-prometheus-chartUpgrade olcnectlUpgrade istio-istioctlUpgrade olcne-istio-chartUpgrade olcne-agentUpgrade kubeadmUpgrade olcne-api-serverUpgrade kubectlUpgrade olcne-olm-chart | Nov 9, 2021 | Aug 24, 2021 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub