{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-29479",
        "STATE": "PUBLIC",
        "TITLE": "Cached redirect poisoning via X-Forwarded-Host header"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "ratpack",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "< 1.9.0"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "ratpack"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Ratpack is a toolkit for creating web applications. In versions prior to 1.9.0, a user supplied `X-Forwarded-Host` header can be used to perform cache poisoning of a cache fronting a Ratpack server if the cache key does not include the `X-Forwarded-Host` header as a cache key. Users are only vulnerable if they do not configure a custom `PublicAddress` instance. For versions prior to 1.9.0, by default, Ratpack utilizes an inferring version of `PublicAddress` which is vulnerable. This can be used to perform redirect cache poisoning where an attacker can force a cached redirect to redirect to their site instead of the intended redirect location. The vulnerability was patched in Ratpack 1.9.0. As a workaround, ensure that `ServerConfigBuilder::publicAddress` correctly configures the server in production."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.0,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-807: Reliance on Untrusted Inputs in a Security Decision"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://portswigger.net/web-security/web-cache-poisoning",
                "refsource": "MISC",
                "url": "https://portswigger.net/web-security/web-cache-poisoning"
            },
            {
                "name": "https://github.com/ratpack/ratpack/security/advisories/GHSA-w6rq-6h34-vh7q",
                "refsource": "CONFIRM",
                "url": "https://github.com/ratpack/ratpack/security/advisories/GHSA-w6rq-6h34-vh7q"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-w6rq-6h34-vh7q",
        "discovery": "UNKNOWN"
    }
}