{
    "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2017-18078",
        "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": "systemd-tmpfiles in systemd before 237 attempts to support ownership/permission changes on hardlinked files even if the fs.protected_hardlinks sysctl is turned off, which allows local users to bypass intended access restrictions via vectors involving a hard link to a file for which the user lacks write access, as demonstrated by changing the ownership of the /etc/passwd file."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "openSUSE-SU-2018:0560",
                "refsource": "SUSE",
                "url": "http://lists.opensuse.org/opensuse-updates/2018-02/msg00109.html"
            },
            {
                "name": "[oss-security] 20180129 CVE-2018-18078: systemd-tmpfiles root privilege escalation with fs.protected_hardlinks=0",
                "refsource": "MLIST",
                "url": "http://www.openwall.com/lists/oss-security/2018/01/29/3"
            },
            {
                "name": "43935",
                "refsource": "EXPLOIT-DB",
                "url": "https://www.exploit-db.com/exploits/43935/"
            },
            {
                "name": "https://github.com/systemd/systemd/issues/7736",
                "refsource": "MISC",
                "url": "https://github.com/systemd/systemd/issues/7736"
            },
            {
                "name": "http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html",
                "refsource": "MISC",
                "url": "http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html"
            },
            {
                "name": "[oss-security] 20180129 Re: CVE-2017-18078: systemd-tmpfiles root privilege",
                "refsource": "MLIST",
                "url": "https://www.openwall.com/lists/oss-security/2018/01/29/4"
            },
            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20190424 [SECURITY] [DLA 1762-1] systemd security update",
                "url": "https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html"
            }
        ]
    }
}