{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2020-5216",
        "STATE": "PUBLIC",
        "TITLE": "Limited header injection when using dynamic overrides with user input in RubyGems secure_headers"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "secure_headers",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 3.9.0"
                                        },
                                        {
                                            "version_value": ">= 5.0.0, < 5.2.0"
                                        },
                                        {
                                            "version_value": ">= 6.0.0, < 6.3.0"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "Twitter"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In Secure Headers (RubyGem secure_headers), a directive injection vulnerability is present in versions before 3.9.0, 5.2.0, and 6.3.0. If user-supplied input was passed into append/override_content_security_policy_directives, a newline could be injected leading to limited header injection. Upon seeing a newline in the header, rails will silently create a new Content-Security-Policy header with the remaining value of the original string. It will continue to create new headers for each newline. This has been fixed in 6.3.0, 5.2.0, and 3.9.0."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting')"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/twitter/secure_headers/security/advisories/GHSA-w978-rmpf-qmwg",
                "refsource": "CONFIRM",
                "url": "https://github.com/twitter/secure_headers/security/advisories/GHSA-w978-rmpf-qmwg"
            },
            {
                "name": "https://github.com/twitter/secure_headers/commit/301695706f6a70517c2a90c6ef9b32178440a2d0",
                "refsource": "MISC",
                "url": "https://github.com/twitter/secure_headers/commit/301695706f6a70517c2a90c6ef9b32178440a2d0"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-w978-rmpf-qmwg",
        "discovery": "UNKNOWN"
    }
}