cvelist/2021/41xxx/CVE-2021-41186.json

{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-41186",
        "STATE": "PUBLIC",
        "TITLE": "ReDoS vulnerability in parser_apache2"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "fluentd",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": ">= 0.14.14, < 1.14.2"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "fluent"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Fluentd collects events from various data sources and writes them to files to help unify logging infrastructure. The parser_apache2 plugin in Fluentd v0.14.14 to v1.14.1 suffers from a regular expression denial of service (ReDoS) vulnerability. A broken apache log with a certain pattern of string can spend too much time in a regular expression, resulting in the potential for a DoS attack. This issue is patched in version 1.14.2 There are two workarounds available. Either don't use parser_apache2 for parsing logs (which cannot guarantee generated by Apache), or put patched version of parser_apache2.rb into /etc/fluent/plugin directory (or any other directories specified by the environment variable `FLUENT_PLUGIN` or `--plugin` option of fluentd)."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-400: Uncontrolled Resource Consumption"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662",
                "refsource": "CONFIRM",
                "url": "https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662"
            },
            {
                "name": "https://github.com/fluent/fluentd/blob/master/CHANGELOG.md#v1142",
                "refsource": "MISC",
                "url": "https://github.com/fluent/fluentd/blob/master/CHANGELOG.md#v1142"
            },
            {
                "name": "https://github.com/github/securitylab-vulnerabilities/blob/52dc4a2a828c6dc24231967c2937ad92038184a9/vendor_reports/GHSL-2021-102-fluent-fluentd.md",
                "refsource": "MISC",
                "url": "https://github.com/github/securitylab-vulnerabilities/blob/52dc4a2a828c6dc24231967c2937ad92038184a9/vendor_reports/GHSL-2021-102-fluent-fluentd.md"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-hwhf-64mh-r662",
        "discovery": "UNKNOWN"
    }
}