{
    "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2015-4020",
        "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": "RubyGems 2.0.x before 2.0.17, 2.2.x before 2.2.5, and 2.4.x before 2.4.8 does not validate the hostname when fetching gems or making API requests, which allows remote attackers to redirect requests to arbitrary domains via a crafted DNS SRV record with a domain that is suffixed with the original domain name, aka a \"DNS hijack attack.\" NOTE: this vulnerability exists because to an incomplete fix for CVE-2015-3900."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "http://blog.rubygems.org/2015/06/08/2.2.5-released.html",
                "refsource": "CONFIRM",
                "url": "http://blog.rubygems.org/2015/06/08/2.2.5-released.html"
            },
            {
                "name": "https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/",
                "refsource": "MISC",
                "url": "https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/"
            },
            {
                "name": "75431",
                "refsource": "BID",
                "url": "http://www.securityfocus.com/bid/75431"
            },
            {
                "name": "https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478",
                "refsource": "MISC",
                "url": "https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478"
            },
            {
                "name": "http://blog.rubygems.org/2015/06/08/2.4.8-released.html",
                "refsource": "CONFIRM",
                "url": "http://blog.rubygems.org/2015/06/08/2.4.8-released.html"
            },
            {
                "name": "https://github.com/rubygems/rubygems/commit/5c7bfb5",
                "refsource": "CONFIRM",
                "url": "https://github.com/rubygems/rubygems/commit/5c7bfb5"
            },
            {
                "name": "https://puppet.com/security/cve/CVE-2015-3900",
                "refsource": "CONFIRM",
                "url": "https://puppet.com/security/cve/CVE-2015-3900"
            },
            {
                "name": "http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html",
                "refsource": "CONFIRM",
                "url": "http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html"
            }
        ]
    }
}