BIT-envoy-2021-43826

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    BIT-envoy-2021-43826

    Published: 6 Mar 2024Last Modified: 8 Sept 2026

    Summary: Crash when tunneling TCP over HTTP in Envoy

    Details: 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.

    References: https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145, https://github.com/envoyproxy/envoy/security/advisories/GHSA-cmx3-fvgf-83mf, https://nvd.nist.gov/vuln/detail/CVE-2021-43826

    Affected packages

    Package

    Name: envoy

    Purl: pkg:bitnami/envoy

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -1.18.6

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    BIT-envoy-2021-43826 | CVE-DB