{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2023-4809",
        "ASSIGNER": "secteam@freebsd.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In pf packet processing with a 'scrub fragment reassemble' rule, a packet containing multiple IPv6 fragment headers would be reassembled, and then immediately processed.  That is, a packet with multiple fragment extension headers would not be recognized as the correct ultimate payload. Instead a packet with multiple IPv6 fragment headers would unexpectedly be interpreted as a fragmented packet, rather than as whatever the real payload is.\n\n\n\n\nAs a result, IPv6 fragments may bypass pf firewall rules written on the assumption all fragments have been reassembled and, as a result, be forwarded or processed by the host.\n\n"
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-167: Improper Handling of Additional Special Element",
                        "cweId": "CWE-167"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "FreeBSD",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "FreeBSD",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "13.2-RELEASE",
                                            "version_value": "p3"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "12.4-RELEASE",
                                            "version_value": "p5"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-23:10.pf.asc",
                "refsource": "MISC",
                "name": "https://security.FreeBSD.org/advisories/FreeBSD-SA-23:10.pf.asc"
            },
            {
                "url": "http://www.openwall.com/lists/oss-security/2023/09/08/5",
                "refsource": "MISC",
                "name": "http://www.openwall.com/lists/oss-security/2023/09/08/5"
            },
            {
                "url": "http://www.openwall.com/lists/oss-security/2023/09/08/6",
                "refsource": "MISC",
                "name": "http://www.openwall.com/lists/oss-security/2023/09/08/6"
            },
            {
                "url": "http://www.openwall.com/lists/oss-security/2023/09/08/7",
                "refsource": "MISC",
                "name": "http://www.openwall.com/lists/oss-security/2023/09/08/7"
            },
            {
                "url": "https://security.netapp.com/advisory/ntap-20231221-0009/",
                "refsource": "MISC",
                "name": "https://security.netapp.com/advisory/ntap-20231221-0009/"
            }
        ]
    },
    "generator": {
        "engine": "Vulnogram 0.1.0-dev"
    },
    "source": {
        "discovery": "UNKNOWN"
    },
    "credits": [
        {
            "lang": "en",
            "value": "Enrico Bassetti bassetti@di.uniroma1.it (NetSecurityLab @ Sapienza University of Rome)"
        }
    ]
}