{
  "threat_severity" : "Moderate",
  "public_date" : "2022-02-22T07:00:00Z",
  "bugzilla" : {
    "description" : "envoy: Use-after-free when tunneling TCP over HTTP",
    "id" : "2050748",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2050748"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-416",
  "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.", "A flaw was found in envoy. If a downstream source disconnects during upstream connection establishment when tunneling TCP over HTTP, a use-after-free can occur, resulting in a denial of service." ],
  "affected_release" : [ {
    "product_name" : "OpenShift Service Mesh 2.0",
    "release_date" : "2022-04-07T00:00:00Z",
    "advisory" : "RHSA-2022:1276",
    "cpe" : "cpe:/a:redhat:service_mesh:2.0::el8",
    "package" : "servicemesh-proxy-0:2.0.9-3.el8"
  }, {
    "product_name" : "OpenShift Service Mesh 2.1",
    "release_date" : "2022-04-07T00:00:00Z",
    "advisory" : "RHSA-2022:1275",
    "cpe" : "cpe:/a:redhat:service_mesh:2.1::el8",
    "package" : "servicemesh-proxy-0:2.1.2-4.el8"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2021-43826\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-43826\nhttps://github.com/envoyproxy/envoy/security/advisories/GHSA-cmx3-fvgf-83mf" ],
  "name" : "CVE-2021-43826",
  "csaw" : false
}