When a TLS 1.3 client processes a HelloRetryRequest, it copies the server's cookie into its second ClientHello without checking that the cookie fits in the outgoing packet. Both the length and the contents of that cookie come from the peer,…

{
                    "vendor": "Eclipse Foundation",
                    "product": "NetX Duo",
                    "packageName": "NetX Duo",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThanOrEqual": "6.5.1.202602",
                            "versionType": "custom"
                        },
                        {
                            "status": "unaffected",
                            "version": "6.5.2.202603"
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                    "defaultStatus": "unaffected"
                }