Vulnerability Monitor

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CVE-2021-43826

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.

Published

2022-02-22T23:15:10.957

Last Modified

2024-11-21T06:29:52.647

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-416

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	envoyproxy	envoy	< 1.18.6	Yes
Application	envoyproxy	envoy	< 1.19.3	Yes
Application	envoyproxy	envoy	< 1.20.2	Yes
Application	envoyproxy	envoy	< 1.21.1	Yes

References

https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145 Patch, Third Party Advisory ([email protected])
https://github.com/envoyproxy/envoy/security/advisories/GHSA-cmx3-fvgf-83mf Issue Tracking, Third Party Advisory ([email protected])
https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/envoyproxy/envoy/security/advisories/GHSA-cmx3-fvgf-83mf Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)