{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "state": "PUBLISHED",
        "cveId": "CVE-2021-27645",
        "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "assignerShortName": "mitre",
        "dateUpdated": "2025-06-09T14:58:23.319Z",
        "dateReserved": "2021-02-24T00:00:00.000Z",
        "datePublished": "2021-02-24T00:00:00.000Z"
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    "containers": {
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                "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
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                "dateUpdated": "2022-10-17T00:00:00.000Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "The nameserver caching daemon (nscd) in the GNU C Library (aka glibc or libc6) 2.29 through 2.33, when processing a request for netgroup lookup, may crash due to a double-free, potentially resulting in degraded service or Denial of Service on the local system. This is related to netgroupcache.c."
                }
            ],
            "affected": [
                {
                    "vendor": "n/a",
                    "product": "n/a",
                    "versions": [
                        {
                            "version": "n/a",
                            "status": "affected"
                        }
                    ]
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            ],
            "references": [
                {
                    "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=27462"
                },
                {
                    "name": "FEDORA-2021-6749bfcfd9",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/"
                },
                {
                    "name": "FEDORA-2021-2ba993d6c5",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/"
                },
                {
                    "name": "GLSA-202107-07",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://security.gentoo.org/glsa/202107-07"
                },
                {
                    "name": "[debian-lts-announce] 20221017 [SECURITY] [DLA 3152-1] glibc security update",
                    "tags": [
                        "mailing-list"
                    ],
                    "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html"
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "type": "text",
                            "lang": "en",
                            "description": "n/a"
                        }
                    ]
                }
            ]
        },
        "adp": [
            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2024-08-03T21:26:10.554Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=27462",
                        "tags": [
                            "x_transferred"
                        ]
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                    {
                        "name": "FEDORA-2021-6749bfcfd9",
                        "tags": [
                            "vendor-advisory",
                            "x_transferred"
                        ],
                        "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/"
                    },
                    {
                        "name": "FEDORA-2021-2ba993d6c5",
                        "tags": [
                            "vendor-advisory",
                            "x_transferred"
                        ],
                        "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/"
                    },
                    {
                        "name": "GLSA-202107-07",
                        "tags": [
                            "vendor-advisory",
                            "x_transferred"
                        ],
                        "url": "https://security.gentoo.org/glsa/202107-07"
                    },
                    {
                        "name": "[debian-lts-announce] 20221017 [SECURITY] [DLA 3152-1] glibc security update",
                        "tags": [
                            "mailing-list",
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                        ],
                        "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html"
                    }
                ]
            },
            {
                "problemTypes": [
                    {
                        "descriptions": [
                            {
                                "type": "CWE",
                                "cweId": "CWE-415",
                                "lang": "en",
                                "description": "CWE-415 Double Free"
                            }
                        ]
                    }
                ],
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 2.5,
                            "attackVector": "LOCAL",
                            "baseSeverity": "LOW",
                            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
                            "integrityImpact": "NONE",
                            "userInteraction": "NONE",
                            "attackComplexity": "HIGH",
                            "availabilityImpact": "LOW",
                            "privilegesRequired": "LOW",
                            "confidentialityImpact": "NONE"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2025-06-09T14:57:29.856656Z",
                                "id": "CVE-2021-27645",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2025-06-09T14:58:23.319Z"
                }
            }
        ]
    }
}