CVE-2021-43826

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Source
https://nvd.nist.gov/vuln/detail/CVE-2021-43826
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-43826.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-43826
Aliases
Downstream
Related
  • GHSA-cmx3-fvgf-83mf
Published
2022-02-22T23:15:10.957Z
Modified
2025-11-14T12:36:22.966176Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
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

Affected packages

Git / github.com/envoyproxy/envoy

Affected ranges

Type
GIT
Repo
https://github.com/envoyproxy/envoy
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
ce0ae309057a216aba031aff81c445c90c6ef145

Affected versions

v1.*

v1.0.0
v1.1.0
v1.10.0
v1.11.0
v1.12.0
v1.13.0
v1.14.0
v1.15.0
v1.16.0
v1.17.0
v1.18.0
v1.18.1
v1.18.2
v1.19.0
v1.2.0
v1.20.0
v1.21.0
v1.3.0
v1.4.0
v1.5.0
v1.6.0
v1.7.0
v1.8.0
v1.9.0

Database specific

vanir_signatures

[
    {
        "source": "https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145",
        "id": "CVE-2021-43826-0d15ab6b",
        "signature_version": "v1",
        "digest": {
            "function_hash": "296559161755360112084384558440136934044",
            "length": 808.0
        },
        "target": {
            "file": "source/common/tcp_proxy/tcp_proxy.cc",
            "function": "Filter::onDownstreamEvent"
        },
        "deprecated": false,
        "signature_type": "Function"
    },
    {
        "source": "https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145",
        "id": "CVE-2021-43826-541b9b50",
        "signature_version": "v1",
        "digest": {
            "function_hash": "63191530169222520921233896458439701262",
            "length": 711.0
        },
        "target": {
            "file": "source/common/tcp_proxy/tcp_proxy.cc",
            "function": "Filter::onUpstreamEvent"
        },
        "deprecated": false,
        "signature_type": "Function"
    },
    {
        "source": "https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145",
        "id": "CVE-2021-43826-7c5698d5",
        "signature_version": "v1",
        "digest": {
            "line_hashes": [
                "245673340480709380475607110780385137708",
                "285494569074532567258474565032572094364",
                "121492910522987967398570563042373873103",
                "208903825150298770882316003860954195851"
            ],
            "threshold": 0.9
        },
        "target": {
            "file": "source/common/tcp_proxy/tcp_proxy.h"
        },
        "deprecated": false,
        "signature_type": "Line"
    },
    {
        "source": "https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145",
        "id": "CVE-2021-43826-aaaa5efa",
        "signature_version": "v1",
        "digest": {
            "line_hashes": [
                "146243477446113422387021212725253250778",
                "48539946143607539866181123457421037495",
                "283468910120726656487263215273247794220",
                "32816829629574534818331468211218975208",
                "167487698232686579647343259536732486616",
                "18932793910309592312745692489877318569",
                "190222441294940987692714025372522320194",
                "233481120278761949454860284316900076892",
                "33182693539138785849824461743826464632",
                "238411867963402661331142337279192022640"
            ],
            "threshold": 0.9
        },
        "target": {
            "file": "source/common/tcp_proxy/tcp_proxy.cc"
        },
        "deprecated": false,
        "signature_type": "Line"
    },
    {
        "source": "https://github.com/envoyproxy/envoy/commit/ce0ae309057a216aba031aff81c445c90c6ef145",
        "id": "CVE-2021-43826-d662927a",
        "signature_version": "v1",
        "digest": {
            "line_hashes": [
                "222375982320279527150068471158201686244",
                "165738277750233846199418982723160704713",
                "44051101608002913249948422506083140770"
            ],
            "threshold": 0.9
        },
        "target": {
            "file": "test/integration/tcp_tunneling_integration_test.cc"
        },
        "deprecated": false,
        "signature_type": "Line"
    }
]