{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-21359",
        "STATE": "PUBLIC",
        "TITLE": "Denial of Service in Page Error Handling"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "TYPO3.CMS",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": ">= 9.0.0, <= 9.5.24"
                                        },
                                        {
                                            "version_value": ">= 10.0.0, <= 10.4.13"
                                        },
                                        {
                                            "version_value": ">= 11.0.0, <= 11.1.0"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "TYPO3"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.25, 10.4.14, 11.1.1 requesting invalid or non-existing resources via HTTP triggers the page error handler which again could retrieve content to be shown as error message from another page. This leads to a scenario in which the application is calling itself recursively - amplifying the impact of the initial attack until the limits of the web server are exceeded. This is fixed in versions 9.5.25, 10.4.14, 11.1.1."
            }
        ]
    },
    "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-674 Uncontrolled Recursion"
                    }
                ]
            },
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-405 Asymmetric Resource Consumption (Amplification)"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://packagist.org/packages/typo3/cms-core",
                "refsource": "MISC",
                "url": "https://packagist.org/packages/typo3/cms-core"
            },
            {
                "name": "https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-4p9g-qgx9-397p",
                "refsource": "CONFIRM",
                "url": "https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-4p9g-qgx9-397p"
            },
            {
                "name": "https://typo3.org/security/advisory/typo3-core-sa-2021-005",
                "refsource": "MISC",
                "url": "https://typo3.org/security/advisory/typo3-core-sa-2021-005"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-4p9g-qgx9-397p",
        "discovery": "UNKNOWN"
    }
}