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{"bugzilla": {"description": "envoy: excessive iteration due to listener filter timeout leads to DoS", "id": "1770713", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1770713"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-400", "details": ["Envoy 1.12.0 allows a remote denial of service because of resource loops, as demonstrated by a single idle TCP connection being able to keep a worker thread in an infinite busy loop when continue_on_listener_filters_timeout is used.\"", "A flaw was found in envoy. When listeners are configured with `continue_on_listener_filters_timeout` true, an infinite busy loop is created if at least one connection is maintained on the loop. A remote attacker only needs to maintain one idle connection to consume one CPU core of the Envoy server, potentially leading to a denial of service attack. The highest threat from this vulnerability is to system availability."], "name": "CVE-2019-18836", "package_state": [{"cpe": "cpe:/a:redhat:service_mesh:1", "fix_state": "Not affected", "package_name": "envoy", "product_name": "OpenShift Service Mesh 1"}], "public_date": "2019-11-11T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-18836\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-18836\nhttps://github.com/envoyproxy/envoy/security/advisories/GHSA-3xvf-4396-cj46"], "threat_severity": "Important"}