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{"cveTags": [], "descriptions": [{"lang": "en", "value": "Envoy is a cloud-native, open source edge and service proxy. The HTTP/2 protocol stack in Envoy versions prior to 1.29.3, 1.28.2, 1.27.4, and 1.26.8 are vulnerable to CPU exhaustion due to flood of CONTINUATION frames. Envoy's HTTP/2 codec allows the client to send an unlimited number of CONTINUATION frames even after exceeding Envoy's header map limits. This allows an attacker to send a sequence of CONTINUATION frames without the END_HEADERS bit set causing CPU utilization, consuming approximately 1 core per 300Mbit/s of traffic and culminating in denial of service through CPU exhaustion. Users should upgrade to version 1.29.3, 1.28.2, 1.27.4, or 1.26.8 to mitigate the effects of the CONTINUATION flood. As a workaround, disable HTTP/2 protocol for downstream connections."}, {"lang": "es", "value": "Envoy es un proxy de servicio y borde de c\u00f3digo abierto, nativo de la nube. La pila de protocolos HTTP/2 en las versiones de Envoy anteriores a 1.29.3, 1.28.2, 1.27.4 y 1.26.8 son vulnerables al agotamiento de la CPU debido a la inundaci\u00f3n de tramas de CONTINUACI\u00d3N. El c\u00f3dec HTTP/2 de Envoy permite al cliente enviar un n\u00famero ilimitado de tramas de CONTINUACI\u00d3N incluso despu\u00e9s de exceder los l\u00edmites del mapa de encabezado de Envoy. Esto permite a un atacante enviar una secuencia de tramas CONTINUATION sin que el bit END_HEADERS est\u00e9 configurado causando la utilizaci\u00f3n de la CPU, consumiendo aproximadamente 1 n\u00facleo por cada 300 Mbit/s de tr\u00e1fico y culminando en una denegaci\u00f3n de servicio por agotamiento de la CPU. Los usuarios deben actualizar a la versi\u00f3n 1.29.3, 1.28.2, 1.27.4 o 1.26.8 para mitigar los efectos de la inundaci\u00f3n de CONTINUACI\u00d3N. Como workaround, deshabilite el protocolo HTTP/2 para conexiones descendentes."}], "id": "CVE-2024-30255", "lastModified": "2024-05-01T18:15:19.723", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2024-04-04T20:15:08.983", "references": [{"source": "security-advisories@github.com", "url": "http://www.openwall.com/lists/oss-security/2024/04/03/16"}, {"source": "security-advisories@github.com", "url": "http://www.openwall.com/lists/oss-security/2024/04/05/3"}, {"source": "security-advisories@github.com", "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-j654-3ccm-vfmm"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-390"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Bartek Nowotarski (nowotarski.info) for reporting this issue.", "affected_release": [{"advisory": "RHSA-2024:4520", "cpe": "cpe:/a:redhat:rhmt:1.7::el8", "package": "rhmtc/openshift-migration-velero-plugin-for-gcp-rhel8:v1.7.16-6", "product_name": "Red Hat Migration Toolkit for Containers 1.7", "release_date": "2024-07-11T00:00:00Z"}], "bugzilla": {"description": "envoy: HTTP/2 CPU exhaustion due to CONTINUATION frame flood", "id": "2272986", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2272986"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "status": "verified"}, "cwe": "CWE-390", "details": ["Envoy is a cloud-native, open source edge and service proxy. The HTTP/2 protocol stack in Envoy versions prior to 1.29.3, 1.28.2, 1.27.4, and 1.26.8 are vulnerable to CPU exhaustion due to flood of CONTINUATION frames. Envoy's HTTP/2 codec allows the client to send an unlimited number of CONTINUATION frames even after exceeding Envoy's header map limits. This allows an attacker to send a sequence of CONTINUATION frames without the END_HEADERS bit set causing CPU utilization, consuming approximately 1 core per 300Mbit/s of traffic and culminating in denial of service through CPU exhaustion. Users should upgrade to version 1.29.3, 1.28.2, 1.27.4, or 1.26.8 to mitigate the effects of the CONTINUATION flood. As a workaround, disable HTTP/2 protocol for downstream connections.", "A vulnerability was found in how Envoy Proxy implements the HTTP/2 codec. There are insufficient limitations placed on the amount of CONTINUATION frames that can be sent within a single stream. This issue could allow an unauthenticated remote attacker to send packets to vulnerable servers, which could use up compute resources to cause a Denial of Service."], "mitigation": {"lang": "en:us", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible."}, "name": "CVE-2024-30255", "package_state": [{"cpe": "cpe:/a:redhat:openshift_custom_metrics_autoscaler:2", "fix_state": "Will not fix", "package_name": "custom-metrics-autoscaler-tech-preview/custom-metrics-autoscaler-rhel8", "product_name": "Custom metric autoscaler Operator for Red Hat Openshift"}, {"cpe": "cpe:/a:redhat:logging:5", "fix_state": "Not affected", "package_name": "openshift-logging/logging-loki-rhel8", "product_name": "Logging Subsystem for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:lvms:4", "fix_state": "Affected", "package_name": "lvms4/topolvm-rhel9", "product_name": "Logical Volume Manager Storage"}, {"cpe": "cpe:/a:redhat:migration_toolkit_applications:6", "fix_state": "Will not fix", "package_name": "mta/mta-hub-rhel8", "product_name": "Migration Toolkit for Applications 6"}, {"cpe": "cpe:/a:redhat:openshift_api_data_protection:1", "fix_state": "Not affected", "package_name": "oadp/oadp-velero-plugin-for-gcp-rhel8", "product_name": "OpenShift API for Data Protection"}, {"cpe": "cpe:/a:redhat:openshift_api_data_protection:1", "fix_state": "Not affected", "package_name": "oadp/oadp-velero-rhel8", "product_name": "OpenShift API for Data Protection"}, {"cpe": "cpe:/a:redhat:serverless:1", "fix_state": "Will not fix", "package_name": "openshift-serverless-1/eventing-mtping-rhel8", "product_name": "OpenShift Serverless"}, {"cpe": "cpe:/a:redhat:service_mesh:2", "fix_state": "Will not fix", "package_name": "openshift-service-mesh/istio-cni-rhel8", "product_name": "OpenShift Service Mesh 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "package_name": "rhacm2/acm-grafana-rhel8", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Not affected", "package_name": "rhacm2/management-ingress-rhel7", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}, {"cpe": "cpe:/a:redhat:ceph_storage:5", "fix_state": "Affected", "package_name": "rhceph/rhceph-5-dashboard-rhel8", "product_name": "Red Hat Ceph Storage 5"}, {"cpe": "cpe:/a:redhat:ceph_storage:6", "fix_state": "Affected", "package_name": "rhceph/rhceph-6-dashboard-rhel9", "product_name": "Red Hat Ceph Storage 6"}, {"cpe": "cpe:/a:redhat:ceph_storage:7", "fix_state": "Affected", "package_name": "rhceph/grafana-rhel9", "product_name": "Red Hat Ceph Storage 7"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Will not fix", "package_name": "openshift4/ose-contour-rhel8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift4/ose-prometheus", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift-selinuxd-container", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift_container_storage:4", "fix_state": "Affected", "package_name": "ocs4/cephcsi-rhel8", "product_name": "Red Hat Openshift Container Storage 4"}, {"cpe": "cpe:/a:redhat:openshift_data_foundation:4", "fix_state": "Not affected", "package_name": "odf4/odf-topolvm-rhel8", "product_name": "Red Hat Openshift Data Foundation 4"}, {"cpe": "cpe:/a:redhat:openshift_data_science", "fix_state": "Affected", "package_name": "rhods/odh-ml-pipelines-cache-rhel8", "product_name": "Red Hat OpenShift Data Science (RHODS)"}, {"cpe": "cpe:/a:redhat:openshift_data_science", "fix_state": "Affected", "package_name": "rhods/odh-operator-base-rhel8", "product_name": "Red Hat OpenShift Data Science (RHODS)"}, {"cpe": "cpe:/a:redhat:openshift_devspaces:3::el8", "fix_state": "Affected", "package_name": "devspaces/devspaces-rhel8-operator", "product_name": "Red Hat OpenShift Dev Spaces"}, {"cpe": "cpe:/a:redhat:openshift_distributed_tracing:2", "fix_state": "Will not fix", "package_name": "rhosdt/tempo-gateway-rhel8", "product_name": "Red Hat OpenShift distributed tracing 2"}, {"cpe": "cpe:/a:redhat:openshift_sandboxed_containers:1", "fix_state": "Affected", "package_name": "openshift-sandboxed-containers-tech-preview/osc-rhel8-operator", "product_name": "Red Hat Openshift sandboxed containers"}, {"cpe": "cpe:/a:redhat:openstack:16.2", "fix_state": "Not affected", "package_name": "osp-director-provisioner-container", "product_name": "Red Hat OpenStack Platform 16.2"}], "public_date": "2024-04-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-30255\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-30255\nhttps://github.com/envoyproxy/envoy/security/advisories/GHSA-j654-3ccm-vfmm\nhttps://nowotarski.info/http2-continuation-flood/\nhttps://www.kb.cert.org/vuls/id/421644"], "statement": "Red Hat rates the security impact of this vulnerability as Moderate, in alignment with upstream Envoy. The worst case scenario is excessive CPU utilization causing a denial of service. Once an attack has ended, the system should return to normal operations on its own.", "threat_severity": "Moderate", "upstream_fix": "envoy 1.29.3, envoy 1.28.2, envoy 1.27.4, envoy 1.26.8"}