{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "state": "PUBLISHED",
        "cveId": "CVE-2021-21424",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "dateUpdated": "2024-08-03T18:09:16.141Z",
        "dateReserved": "2020-12-22T00:00:00",
        "datePublished": "2021-05-13T00:00:00"
    },
    "containers": {
        "cna": {
            "title": "Prevent user enumeration using Guard or the new Authenticator-based Security",
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2023-07-12T00:00:00"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Symfony is a PHP framework for web and console applications and a set of reusable PHP components. The ability to enumerate users was possible without relevant permissions due to different handling depending on whether the user existed or not when attempting to use the switch users functionality. We now ensure that 403s are returned whether the user exists or not if a user cannot switch to a user or if the user does not exist. The patch for this issue is available for branch 3.4."
                }
            ],
            "affected": [
                {
                    "vendor": "symfony",
                    "product": "symfony",
                    "versions": [
                        {
                            "version": ">= 2.8.0, < 3.4.48",
                            "status": "affected"
                        },
                        {
                            "version": ">= 4.0.0, < 4.4.23",
                            "status": "affected"
                        },
                        {
                            "version": ">= 5.0.0, < 5.2.8",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://github.com/symfony/symfony/security/advisories/GHSA-5pv8-ppvj-4h68"
                },
                {
                    "url": "https://github.com/symfony/symfony/commit/2a581d22cc621b33d5464ed65c4bc2057f72f011"
                },
                {
                    "name": "FEDORA-2021-f3ad34aa9f",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KENRNLB3FYXYGDWRBH2PDBOZZKOD7VY4/"
                },
                {
                    "name": "FEDORA-2021-121edb82dd",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VRUS2H2SSOQWNLBD35SKIWIDQEMV2PD3/"
                },
                {
                    "name": "FEDORA-2021-c57937ab9f",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UC7BND775DVZDQT3RMGD2HVB2PKLJDJW/"
                },
                {
                    "name": "FEDORA-2021-2d145b95f6",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RH7TMM5CHQYBFFGXWRPJDPB3SKCZXI2M/"
                },
                {
                    "name": "[debian-lts-announce] 20230711 [SECURITY] [DLA 3493-1] symfony security update",
                    "tags": [
                        "mailing-list"
                    ],
                    "url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00014.html"
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "NONE",
                        "availabilityImpact": "NONE",
                        "baseScore": 5.3,
                        "baseSeverity": "MEDIUM"
                    }
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "type": "CWE",
                            "lang": "en",
                            "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor ",
                            "cweId": "CWE-200"
                        }
                    ]
                }
            ],
            "source": {
                "advisory": "GHSA-5pv8-ppvj-4h68",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2024-08-03T18:09:16.141Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://github.com/symfony/symfony/security/advisories/GHSA-5pv8-ppvj-4h68",
                        "tags": [
                            "x_transferred"
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                    {
                        "url": "https://github.com/symfony/symfony/commit/2a581d22cc621b33d5464ed65c4bc2057f72f011",
                        "tags": [
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                    },
                    {
                        "name": "FEDORA-2021-f3ad34aa9f",
                        "tags": [
                            "vendor-advisory",
                            "x_transferred"
                        ],
                        "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KENRNLB3FYXYGDWRBH2PDBOZZKOD7VY4/"
                    },
                    {
                        "name": "FEDORA-2021-121edb82dd",
                        "tags": [
                            "vendor-advisory",
                            "x_transferred"
                        ],
                        "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VRUS2H2SSOQWNLBD35SKIWIDQEMV2PD3/"
                    },
                    {
                        "name": "FEDORA-2021-c57937ab9f",
                        "tags": [
                            "vendor-advisory",
                            "x_transferred"
                        ],
                        "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UC7BND775DVZDQT3RMGD2HVB2PKLJDJW/"
                    },
                    {
                        "name": "FEDORA-2021-2d145b95f6",
                        "tags": [
                            "vendor-advisory",
                            "x_transferred"
                        ],
                        "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RH7TMM5CHQYBFFGXWRPJDPB3SKCZXI2M/"
                    },
                    {
                        "name": "[debian-lts-announce] 20230711 [SECURITY] [DLA 3493-1] symfony security update",
                        "tags": [
                            "mailing-list",
                            "x_transferred"
                        ],
                        "url": "https://lists.debian.org/debian-lts-announce/2023/07/msg00014.html"
                    }
                ]
            }
        ]
    }
}