{
    "CVE_data_meta": {
        "ASSIGNER": "psirt@cisco.com",
        "ID": "CVE-2017-6657",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Snort 3.0 All versions prior to build 233.",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "Snort 3.0 All versions prior to build 233."
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "n/a"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Cisco Sourcefire Snort 3.0 before build 233 mishandles Ether Type Validation. Since valid ether type and IP protocol numbers do not overlap, Snort++ stores all protocol decoders in a single array. That makes it possible to craft packets that have IP protocol numbers in the ether type field which will confuse the Snort++ decoder. For example, an eth:llc:snap:icmp6 packet will cause a crash because there is no ip6 header with which to calculate the icmp6 checksum. Affected decoders include gre, llc, trans_bridge, ciscometadata, linux_sll, and token_ring. The fix adds a check in the packet manager to validate the ether type before indexing the decoder array. An out of range ether type will raise 116:473."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "input validation error"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "1038483",
                "refsource": "SECTRACK",
                "url": "http://www.securitytracker.com/id/1038483"
            },
            {
                "name": "http://blog.snort.org/2017/05/snort-vulnerabilities-found.html",
                "refsource": "CONFIRM",
                "url": "http://blog.snort.org/2017/05/snort-vulnerabilities-found.html"
            }
        ]
    }
}