{
    "CVE_data_meta": {
        "ASSIGNER": "security@eclipse.org",
        "ID": "CVE-2018-12551",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Eclipse Mosquitto",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": ">=",
                                            "version_value": "1.0"
                                        },
                                        {
                                            "version_affected": "<=",
                                            "version_value": "1.5.5"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "The Eclipse Foundation"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use a password file for authentication, any malformed data in the password file will be treated as valid. This typically means that the malformed data becomes a username and no password. If this occurs, clients can circumvent authentication and get access to the broker by using the malformed username. In particular, a blank line will be treated as a valid empty username. Other security measures are unaffected. Users who have only used the mosquitto_passwd utility to create and modify their password files are unaffected by this vulnerability."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-703: Improper Check or Handling of Exceptional Conditions"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://bugs.eclipse.org/bugs/show_bug.cgi?id=543401",
                "refsource": "CONFIRM",
                "url": "https://bugs.eclipse.org/bugs/show_bug.cgi?id=543401"
            },
            {
                "refsource": "MLIST",
                "name": "[debian-lts-announce] 20191026 [SECURITY] [DLA 1972-1] mosquitto security update",
                "url": "https://lists.debian.org/debian-lts-announce/2019/10/msg00035.html"
            }
        ]
    }
}