Announcing Istio 1.16.4

Istio 1.16.4 patch release.

Apr 4, 2023

This release fixes the security vulnerabilities described in our April 4th post, ISTIO-SECURITY-2023-001. This release note describes what’s different between Istio 1.16.3 and 1.16.4.

BEFORE YOU UPGRADE

Things to know and prepare before upgrading.

DOWNLOAD

Download and install this release.

DOCS

Visit the documentation for this release.

SOURCE CHANGES

Inspect the full set of source code changes.

Security update

CVE-2023-27487: (CVSS Score 8.2, High): Client may fake the header x-envoy-original-path.
CVE-2023-27488: (CVSS Score 5.4, Moderate): gRPC client produces invalid protobuf when an HTTP header with non-UTF8 value is received.
CVE-2023-27491: (CVSS Score 5.4, Moderate): Envoy forwards invalid HTTP/2 and HTTP/3 downstream headers.
CVE-2023-27492: (CVSS Score 4.8, Moderate): Crash when a large request body is processed in Lua filter.
CVE-2023-27493: (CVSS Score 8.1, High): Envoy doesn’t escape HTTP header values.
CVE-2023-27496: (CVSS Score 6.5, Moderate): Crash when a redirect url without a state parameter is received in the OAuth filter.

Changes

Added support for pushing additional federated trust domains from caCertificates to the peer SAN validator. (Issue #41666)
Fixed overwriting label istio.io/rev in injected gateways when istio.io/rev=<tag>. (Issue #33237)
Fixed an issue where you could not change PrivateKeyProvider using proxy-config. (Issue #41760)
Fixed an issue where you could not disable tracing in ProxyConfig. (Issue #31809)
Fixed an issue where istioctl analyze was throwing a SIGSEGV when the optional field ‘filter’ was missing under the EnvoyFilter.ListenerMatch.FilterChainMatch section. (Issue #42831)
Fixed a bug that would cause unexpected behavior when applying access logging configuration based on the direction of traffic. With this fix, access logging configuration for CLIENT or SERVER will not affect each other. Issue # 43371
Fixed an issue where EnvoyFilter for Cluster.ConnectTimeout was affecting unrelated Clusters. (Issue #43435)
Fixed a bug in istioctl analyze where some messages are missed when there are services with no selector in the analyzed namespace.
Fixed an issue causing VMs using auto-registration to ignore labels other than those defined in a WorkloadGroup. (Issue #32210)
Fixed istioctl experimental wait has undecipherable message when PILOT_ENABLE_CONFIG_DISTRIBUTION_TRACKING is not enabled. Issue #42967