Vulnerabilities > CVE-2021-43826 - Use After Free vulnerability in Envoyproxy Envoy

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
network
low complexity
envoyproxy
CWE-416
NVD
Published: 2022-02-22
Updated: 2022-03-02

Summary

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.

Vulnerable Configurations

Part Description Count
Application
Envoyproxy
69

Common Weakness Enumeration (CWE)

References