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{"acknowledgement": "Red Hat would like to thank the Envoy security team for reporting this issue.", "bugzilla": {"description": "envoy: crafted request allows remote attacker to cause denial of service", "id": "1753576", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1753576"}, "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": ["Upon receiving each incoming request header data, Envoy will iterate over existing request headers to verify that the total size of the headers stays below a maximum limit. The implementation in versions 1.10.0 through 1.11.1 for HTTP/1.x traffic and all versions of Envoy for HTTP/2 traffic had O(n^2) performance characteristics. A remote attacker may craft a request that stays below the maximum request header size but consists of many thousands of small headers to consume CPU and result in a denial-of-service attack."], "name": "CVE-2019-15226", "package_state": [{"cpe": "cpe:/a:redhat:service_mesh:1", "fix_state": "Affected", "package_name": "envoy", "product_name": "OpenShift Service Mesh 1"}], "public_date": "2019-10-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-15226\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-15226"], "threat_severity": "Moderate"}