PushContext.mergeGateways methods and the sortConfigByCreationTime function within istio/pilot/pkg/model/push_context.go Impact An attacker that is able to create an Istio Gateway within a Kubernetes cluster gatewaysByNamespace[proxy.ConfigNamespace] } else { configs = ps.allGateways } Listing 1: istio/pilot/pkg/model/push_context.go Recommendation While this issue can likely be remediated by using per-namespace ingress to sensitive data such as private keys. Description One of the primary pillars of a good security model is to limit access to resources on the least- privilege principle, which means restricting access

2 Notable findings 3 Project summary 4 Audit scope 6 Overall assessment 7 Fuzzing 9 Threat model 11 Issues found 17 Review of fixes for issues from previous audit 50 Istio SLSA compliance 52 engagement was a holistic security audit that had several high-level goals: 1. Formalise a threat model of Istio to guide the security audit as well as future security audits. 2. Carry out a manual code foundation for a secure product, and it demonstrates that the Istio community has formulated a threat model that is used to assess which parts of Istio are particularly exposed. In this audit, Ada Logics confirmed

Extension Model Mixer #IstioCon Istiod Cluster 1 Istiod Cluster 2 API server API server Ingress Ingress Service A Service B Service B Mirror Simplified Istio Multicluster Model #IstioCon Istio Innovation Simplified installation Simplified control plane New extension Model Unified multicluster model Simplified VM onboarding Simplified troubleshooting #IstioCon 2021: Year of Istio

the viable solutions to communicate between Legacy VNFs and new CNFs ● Need a stricter security model for end-to-end key protection #IstioCon Legacy VNF  CNF: Option 1 ● Recommended architecture Protection ● SDS (Secret Discovery Service) ● A stricter security model ○ Protections for inline components & workflows ○ Trust model augmentation ■ Impersonating ■ Secret clear in memory ■ Secret

● Capture Traffic Management & Routing intent as “Access Point” Specs ○ Leverage Istio object model: Gateway, VirtualService, DestinationRules, etc. apiVersion: apps.cloud.io/v1 kind: AccessPoint