CVE-2021-43826
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| envoyproxy | envoy | < 1.18.6 | affected |
| envoyproxy | envoy | >= 1.19.0, < 1.19.3 | affected |
| envoyproxy | envoy | >= 1.20.0, < 1.20.2 | affected |
| envoyproxy | envoy | >= 1.21.0, < 1.21.1 | affected |
Weaknesses
- CWE-416: CWE-416: Use After Free
ADP Enrichment
CVE Program Container
Additional References
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-cmx3-fvgf-83mf
- https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-cmx3-fvgf-83mf
- https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145
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