Access Restriction Bypass Affecting istio.io/istio/pilot/pkg/security/authz/model package, versions >=1.12.0 <1.12.2
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20 Jan 2022
20 Jan 2022
How to fix?
istio.io/istio/pilot/pkg/security/authz/model to version 1.12.2 or higher.
Affected versions of this package are vulnerable to Access Restriction Bypass via incorrect configuration generated for proxies of version 1.11 affecting the
notHosts field in the authorization policy. The incorrect configuration could cause requests to accidentally bypass or get rejected by the authorization policy when using the
Istio 1.12 supports the
notHosts fields in authorization policy with a new Envoy API shipped with the 1.12 data plane. A bug in the 1.12.0 and 1.12.1 incorrectly uses the new Envoy API with the 1.11 data plane. This will cause the hosts and notHosts fields to be always matched regardless of the actual value of the host header when mixing 1.12.0/1.12.1 control plane and 1.11 data plane.