cvelist/2021/41xxx/CVE-2021-41267.json

{
    "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-41267",
        "STATE": "PUBLIC",
        "TITLE": "Webcache Poisoning in Symfony"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "symfony",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": ">= 5.2.0, < 5.3.12"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "symfony"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Symfony/Http-Kernel is the HTTP kernel component for Symfony, a PHP framework for web and console applications and a set of reusable PHP components. Headers that are not part of the \"trusted_headers\" allowed list are ignored and protect users from \"Cache poisoning\" attacks. In Symfony 5.2, maintainers added support for the `X-Forwarded-Prefix` headers, but this header was accessible in SubRequest, even if it was not part of the \"trusted_headers\" allowed list. An attacker could leverage this opportunity to forge requests containing a `X-Forwarded-Prefix` header, leading to a web cache poisoning issue. Versions 5.3.12 and later have a patch to ensure that the `X-Forwarded-Prefix` header is not forwarded to subrequests when it is not trusted."
            }
        ]
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/symfony/symfony/pull/44243",
                "refsource": "MISC",
                "url": "https://github.com/symfony/symfony/pull/44243"
            },
            {
                "name": "https://github.com/symfony/symfony/releases/tag/v5.3.12",
                "refsource": "MISC",
                "url": "https://github.com/symfony/symfony/releases/tag/v5.3.12"
            },
            {
                "name": "https://github.com/symfony/symfony/security/advisories/GHSA-q3j3-w37x-hq2q",
                "refsource": "CONFIRM",
                "url": "https://github.com/symfony/symfony/security/advisories/GHSA-q3j3-w37x-hq2q"
            },
            {
                "name": "https://github.com/symfony/symfony/commit/95dcf51682029e89450aee86267e3d553aa7c487",
                "refsource": "MISC",
                "url": "https://github.com/symfony/symfony/commit/95dcf51682029e89450aee86267e3d553aa7c487"
            }
        ]
    },
    "source": {
        "advisory": "GHSA-q3j3-w37x-hq2q",
        "discovery": "UNKNOWN"
    }
}