Description
Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions of Envoy a crash occurs when configured for :ref:`upstream tunneling <envoy_v3_api_field_extensions.filters.network.tcp_proxy.v3.TcpProxy.tunneling_config>` and the downstream connection disconnects while the the upstream connection or http/2 stream is still being established. There are no workarounds for this issue. Users are advised to upgrade.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected products
- envoyproxy / envoy< 1.18.6 – < 1.18.6
- envoyproxy / envoy>= 1.19.0, < 1.19.3 – >= 1.19.0, < 1.19.3
- envoyproxy / envoy>= 1.20.0, < 1.20.2 – >= 1.20.0, < 1.20.2
- envoyproxy / envoy>= 1.21.0, < 1.21.1 – >= 1.21.0, < 1.21.1