Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio’s URI path based authorization policies. Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. As a work around a Lua filter may be written to normalize the path.
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
The product uses a name or reference to access a resource, but the name/reference resolves to a resource that is outside of the intended control sphere.
| Link | Tags |
|---|---|
| https://github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4r | third party advisory |
| https://istio.io/latest/news/security/istio-security-2021-008 | vendor advisory |