{
    "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2021-33912",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "n/a",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "n/a"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "n/a"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "libspf2 before 1.2.11 has a four-byte heap-based buffer overflow that might allow remote attackers to execute arbitrary code (via an unauthenticated e-mail message from anywhere on the Internet) with a crafted SPF DNS record, because of incorrect sprintf usage in SPF_record_expand_data in spf_expand.c. The vulnerable code may be part of the supply chain of a site's e-mail infrastructure (e.g., with additional configuration, Exim can use libspf2; the Postfix web site links to unofficial patches for use of libspf2 with Postfix; older versions of spfquery relied on libspf2) but most often is not."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "refsource": "MISC",
                "name": "https://github.com/shevek/libspf2/tree/8131fe140704eaae695e76b5cd09e39bd1dd220b",
                "url": "https://github.com/shevek/libspf2/tree/8131fe140704eaae695e76b5cd09e39bd1dd220b"
            },
            {
                "refsource": "MISC",
                "name": "https://nathanielbennett.com/blog/libspf2-cve-jan-2022-disclosure",
                "url": "https://nathanielbennett.com/blog/libspf2-cve-jan-2022-disclosure"
            },
            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20220121 [SECURITY] [DLA 2890-1] libspf2 security update",
                "url": "https://lists.debian.org/debian-lts-announce/2022/01/msg00015.html"
            },
            {
                "refsource": "GENTOO",
                "name": "GLSA-202401-22",
                "url": "https://security.gentoo.org/glsa/202401-22"
            }
        ]
    }
}