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{"acknowledgement": "Red Hat would like to thank the Envoy security team for reporting this issue.", "affected_release": [{"advisory": "RHSA-2021:1322", "cpe": "cpe:/a:redhat:service_mesh:1.1::el8", "package": "servicemesh-proxy-0:1.1.13-1.el8", "product_name": "OpenShift Service Mesh 1.1", "release_date": "2021-04-22T00:00:00Z"}, {"advisory": "RHSA-2021:1324", "cpe": "cpe:/a:redhat:service_mesh:2.0::el8", "package": "servicemesh-proxy-0:2.0.3-1.el8", "product_name": "OpenShift Service Mesh 2.0", "release_date": "2021-04-22T00:00:00Z"}], "bugzilla": {"description": "envoyproxy/envoy: NULL pointer dereference in TLS alert code handling", "id": "1942263", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1942263"}, "csaw": false, "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-476", "details": ["An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable NULL pointer dereference and crash in TLS when an unknown TLS alert code is received.", "A NULL pointer dereference vulnerability was found envoyproxy/envoy. This flaw allows an attacker to establish a TLS session that sends an invalid TLS alert code, causing a NULL pointer exception to occur that crashes the application, resulting in a denial of service. The highest threat from this vulnerability is to system availability."], "name": "CVE-2021-28683", "public_date": "2021-04-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-28683\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-28683\nhttps://istio.io/latest/news/security/istio-security-2021-003/"], "threat_severity": "Important", "upstream_fix": "envoyproxy/envoy 1.17.2"}