CVE-2021-43826
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Envoy
PublishedFeb 22, 2022
First seenFeb 22, 2022
Weakness typeCWE-416Use after free
How to fix
Update
- envoyproxy envoy1.18.6, 1.19.3, 1.20.2, 1.21.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| envoyproxy envoy | v < 1.18.6, 1.19.0 ≤ v < 1.19.3, 1.20.0 ≤ v < 1.20.2, 1.21.0 ≤ v < 1.21.1 | 1.18.6, 1.19.3, 1.20.2, 1.21.1 |
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