{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-3864",
        "ASSIGNER": "secalert@redhat.com",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "A flaw was found in the way the dumpable flag setting was handled when certain SUID binaries executed its descendants. The prerequisite is a SUID binary that sets real UID equal to effective UID, and real GID equal to effective GID. The descendant will then have a dumpable value set to 1. As a result, if the descendant process crashes and core_pattern is set to a relative value, its core dump is stored in the current directory with uid:gid permissions. An unprivileged local user with eligible root SUID binary could use this flaw to place core dumps into root-owned directories, potentially resulting in escalation of privileges."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-284 - Improper Access Control",
                        "cweId": "CWE-284"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "n/a",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "kernel",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "Not Known"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://www.openwall.com/lists/oss-security/2021/10/20/2",
                "refsource": "MISC",
                "name": "https://www.openwall.com/lists/oss-security/2021/10/20/2"
            },
            {
                "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2015046",
                "refsource": "MISC",
                "name": "https://bugzilla.redhat.com/show_bug.cgi?id=2015046"
            },
            {
                "url": "https://access.redhat.com/security/cve/CVE-2021-3864",
                "refsource": "MISC",
                "name": "https://access.redhat.com/security/cve/CVE-2021-3864"
            },
            {
                "url": "https://security-tracker.debian.org/tracker/CVE-2021-3864",
                "refsource": "MISC",
                "name": "https://security-tracker.debian.org/tracker/CVE-2021-3864"
            },
            {
                "url": "https://lore.kernel.org/all/20211221021744.864115-1-longman%40redhat.com/",
                "refsource": "MISC",
                "name": "https://lore.kernel.org/all/20211221021744.864115-1-longman%40redhat.com/"
            },
            {
                "url": "https://lore.kernel.org/all/20211226150310.GA992%401wt.eu/",
                "refsource": "MISC",
                "name": "https://lore.kernel.org/all/20211226150310.GA992%401wt.eu/"
            },
            {
                "url": "https://lore.kernel.org/lkml/20211228170910.623156-1-wander%40redhat.com/",
                "refsource": "MISC",
                "name": "https://lore.kernel.org/lkml/20211228170910.623156-1-wander%40redhat.com/"
            }
        ]
    }
}