Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Envoyproxy | Envoy | < 1.18.6 |
Related Weaknesses (CWE)
References
- https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6efPatchThird Party Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-cmx3-fvgf-83mfIssue TrackingThird Party Advisory
- https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6efPatchThird Party Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-cmx3-fvgf-83mfIssue TrackingThird Party Advisory
FAQ
What is CVE-2021-43826?
CVE-2021-43826 is a vulnerability with a CVSS score of 7.5 (HIGH). 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_ex...
How severe is CVE-2021-43826?
CVE-2021-43826 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-43826?
Check the references section above for vendor advisories and patch information. Affected products include: Envoyproxy Envoy.