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.

CVSS v3 7.5 HIGH
CVSS v2.0 4.3 MEDIUM

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145	Patch Third Party Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-cmx3-fvgf-83mf	Issue Tracking Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:envoyproxy:envoy::::::::
	cpe:2.3:a:envoyproxy:envoy::::::::
	cpe:2.3:a:envoyproxy:envoy::::::::
	cpe:2.3:a:envoyproxy:envoy::::::::

History

No history.

Information

Published : 2022-02-22 23:15

Updated : 2022-03-02 15:23

NVD link : CVE-2021-43826

Mitre link : CVE-2021-43826

CVE.ORG link : CVE-2021-43826

JSON object : View

Products Affected

envoyproxy

envoy

CWE

CWE-416

Use After Free

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