{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2009-3727",
        "ASSIGNER": "secalert@redhat.com",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Asterisk Open Source 1.2.x before 1.2.35, 1.4.x before 1.4.26.3, 1.6.0.x before 1.6.0.17, and 1.6.1.x before 1.6.1.9; Business Edition A.x.x, B.x.x before B.2.5.12, C.2.x.x before C.2.4.5, and C.3.x.x before C.3.2.2; AsteriskNOW 1.5; and s800i 1.3.x before 1.3.0.5 generate different error messages depending on whether a SIP username is valid, which allows remote attackers to enumerate valid usernames via multiple crafted REGISTER messages with inconsistent usernames in the URI in the To header and the Digest in the Authorization header."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "n/a",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "n/a",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "n/a"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "http://downloads.asterisk.org/pub/security/AST-2009-008.html",
                "refsource": "MISC",
                "name": "http://downloads.asterisk.org/pub/security/AST-2009-008.html"
            },
            {
                "url": "http://osvdb.org/59697",
                "refsource": "MISC",
                "name": "http://osvdb.org/59697"
            },
            {
                "url": "http://secunia.com/advisories/37265",
                "refsource": "MISC",
                "name": "http://secunia.com/advisories/37265"
            },
            {
                "url": "http://secunia.com/advisories/37479",
                "refsource": "MISC",
                "name": "http://secunia.com/advisories/37479"
            },
            {
                "url": "http://secunia.com/advisories/37677",
                "refsource": "MISC",
                "name": "http://secunia.com/advisories/37677"
            },
            {
                "url": "http://www.debian.org/security/2009/dsa-1952",
                "refsource": "MISC",
                "name": "http://www.debian.org/security/2009/dsa-1952"
            },
            {
                "url": "http://www.securityfocus.com/bid/36924",
                "refsource": "MISC",
                "name": "http://www.securityfocus.com/bid/36924"
            },
            {
                "url": "http://www.securitytracker.com/id?1023133",
                "refsource": "MISC",
                "name": "http://www.securitytracker.com/id?1023133"
            },
            {
                "url": "https://bugzilla.redhat.com/show_bug.cgi?id=523277",
                "refsource": "MISC",
                "name": "https://bugzilla.redhat.com/show_bug.cgi?id=523277"
            },
            {
                "url": "https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00789.html",
                "refsource": "MISC",
                "name": "https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00789.html"
            },
            {
                "url": "https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00838.html",
                "refsource": "MISC",
                "name": "https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00838.html"
            },
            {
                "url": "https://bugzilla.redhat.com/show_bug.cgi?id=533137",
                "refsource": "MISC",
                "name": "https://bugzilla.redhat.com/show_bug.cgi?id=533137"
            }
        ]
    }
}