{
    "CVE_data_meta": {
        "ASSIGNER": "security@xen.org",
        "ID": "CVE-2021-28700",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "xen",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "4.12.x"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "xen",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "?<",
                                            "version_value": "4.12"
                                        },
                                        {
                                            "version_affected": ">=",
                                            "version_value": "4.13.x"
                                        },
                                        {
                                            "version_affected": "!>",
                                            "version_value": "xen-unstable"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "Xen"
                }
            ]
        }
    },
    "configuration": {
        "configuration_data": {
            "description": {
                "description_data": [
                    {
                        "lang": "eng",
                        "value": "Only Arm systems are vulnerable. Only domains created using the\ndom0less feature are affected.\n\nOnly domains created using the dom0less feature can leverage the\nvulnerability.\n\nAll versions of Xen since 4.12 are vulnerable."
                    }
                ]
            }
        }
    },
    "credit": {
        "credit_data": {
            "description": {
                "description_data": [
                    {
                        "lang": "eng",
                        "value": "This issue was discovered by Julien Grall of Amazon."
                    }
                ]
            }
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "xen/arm: No memory limit for dom0less domUs The dom0less feature allows an administrator to create multiple unprivileged domains directly from Xen. Unfortunately, the memory limit from them is not set. This allow a domain to allocate memory beyond what an administrator originally configured."
            }
        ]
    },
    "impact": {
        "impact_data": {
            "description": {
                "description_data": [
                    {
                        "lang": "eng",
                        "value": "Malicious dom0less guest could drive Xen out of memory and may\nresult to a Denial of Service (DoS) attack affecting the entire\nsystem."
                    }
                ]
            }
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "unknown"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "url": "https://xenbits.xenproject.org/xsa/advisory-383.txt",
                "refsource": "MISC",
                "name": "https://xenbits.xenproject.org/xsa/advisory-383.txt"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2021-4f129cc0c1",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LPRVHW4J4ZCPPOHZEWP5MOJT7XDGFFPJ/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2021-d68ed12e46",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FZCNPSRPGFCQRYE2BI4D4Q4SCE56ANV2/"
            },
            {
                "refsource": "DEBIAN",
                "name": "DSA-4977",
                "url": "https://www.debian.org/security/2021/dsa-4977"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2021-081f9bf5d2",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2VQCFAPBNGBBAOMJZG6QBREOG5IIDZID/"
            },
            {
                "refsource": "GENTOO",
                "name": "GLSA-202208-23",
                "url": "https://security.gentoo.org/glsa/202208-23"
            }
        ]
    },
    "workaround": {
        "workaround_data": {
            "description": {
                "description_data": [
                    {
                        "lang": "eng",
                        "value": "There is no known mitigation."
                    }
                ]
            }
        }
    }
}