{
    "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2023-51765",
        "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": "sendmail through 8.17.2 allows SMTP smuggling in certain configurations. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because sendmail supports <LF>.<CR><LF> but some other popular e-mail servers do not. This is resolved in 8.18 and later versions with 'o' in srv_features."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "url": "https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/",
                "refsource": "MISC",
                "name": "https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/"
            },
            {
                "url": "https://www.openwall.com/lists/oss-security/2023/12/22/7",
                "refsource": "MISC",
                "name": "https://www.openwall.com/lists/oss-security/2023/12/22/7"
            },
            {
                "url": "https://www.openwall.com/lists/oss-security/2023/12/21/7",
                "refsource": "MISC",
                "name": "https://www.openwall.com/lists/oss-security/2023/12/21/7"
            },
            {
                "url": "https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc",
                "refsource": "MISC",
                "name": "https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc"
            },
            {
                "refsource": "MLIST",
                "name": "[oss-security] 20231224 Re: Re: New SMTP smuggling attack",
                "url": "http://www.openwall.com/lists/oss-security/2023/12/24/1"
            },
            {
                "refsource": "MLIST",
                "name": "[oss-security] 20231225 Re: Re: New SMTP smuggling attack",
                "url": "http://www.openwall.com/lists/oss-security/2023/12/25/1"
            },
            {
                "refsource": "MISC",
                "name": "https://bugzilla.suse.com/show_bug.cgi?id=1218351",
                "url": "https://bugzilla.suse.com/show_bug.cgi?id=1218351"
            },
            {
                "refsource": "MISC",
                "name": "https://bugzilla.redhat.com/show_bug.cgi?id=2255869",
                "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2255869"
            },
            {
                "refsource": "MISC",
                "name": "https://access.redhat.com/security/cve/CVE-2023-51765",
                "url": "https://access.redhat.com/security/cve/CVE-2023-51765"
            },
            {
                "refsource": "MISC",
                "name": "https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html",
                "url": "https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html"
            },
            {
                "refsource": "MLIST",
                "name": "[oss-security] 20231226 Re: New SMTP smuggling attack",
                "url": "http://www.openwall.com/lists/oss-security/2023/12/26/5"
            },
            {
                "refsource": "MLIST",
                "name": "[oss-security] 20231229 Re: Re: New SMTP smuggling attack",
                "url": "http://www.openwall.com/lists/oss-security/2023/12/29/5"
            },
            {
                "refsource": "MLIST",
                "name": "[oss-security] 20231230 Re: Re: New SMTP smuggling attack",
                "url": "http://www.openwall.com/lists/oss-security/2023/12/30/3"
            },
            {
                "refsource": "MLIST",
                "name": "[oss-security] 20231230 Re: Re: New SMTP smuggling attack",
                "url": "http://www.openwall.com/lists/oss-security/2023/12/30/1"
            },
            {
                "refsource": "MISC",
                "name": "https://www.youtube.com/watch?v=V8KPV96g1To",
                "url": "https://www.youtube.com/watch?v=V8KPV96g1To"
            },
            {
                "refsource": "MISC",
                "name": "https://lwn.net/Articles/956533/",
                "url": "https://lwn.net/Articles/956533/"
            },
            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20240615 [SECURITY] [DLA 3829-1] sendmail security update",
                "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00004.html"
            }
        ]
    }
}