cvelist/2022/33xxx/CVE-2022-33742.json

{
    "CVE_data_meta": {
        "ASSIGNER": "security@xen.org",
        "ID": "CVE-2022-33742",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "?",
                                            "version_value": "consult Xen advisory XSA-403"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "Linux"
                },
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "xen",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "?",
                                            "version_value": "consult Xen advisory XSA-403"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "Xen"
                }
            ]
        }
    },
    "configuration": {
        "configuration_data": {
            "description": {
                "description_data": [
                    {
                        "lang": "eng",
                        "value": "All Linux guests using PV devices are vulnerable in case potentially\nmalicious PV device backends are being used."
                    }
                ]
            }
        }
    },
    "credit": {
        "credit_data": {
            "description": {
                "description_data": [
                    {
                        "lang": "eng",
                        "value": "The issue related to not zeroing memory areas used for shared communications\nwas discovered by Roger Pau Monn\u00e9 of Citrix.\n\nThe issue related to leaking contiguous data in granted pages was disclosed\npublicly."
                    }
                ]
            }
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Linux disk/nic frontends data leaks T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend (CVE-2022-26365, CVE-2022-33740). Additionally the granularity of the grant table doesn't allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend (CVE-2022-33741, CVE-2022-33742)."
            }
        ]
    },
    "impact": {
        "impact_data": {
            "description": {
                "description_data": [
                    {
                        "lang": "eng",
                        "value": "An untrusted backend can access data not intended to be shared.  If such\nmappings are made with write permissions the backend could also cause\nmalfunctions and/or crashes to consumers of contiguous data in the shared\npages."
                    }
                ]
            }
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "unknown"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "url": "https://xenbits.xenproject.org/xsa/advisory-403.txt",
                "refsource": "MISC",
                "name": "https://xenbits.xenproject.org/xsa/advisory-403.txt"
            }
        ]
    },
    "workaround": {
        "workaround_data": {
            "description": {
                "description_data": [
                    {
                        "lang": "eng",
                        "value": "There is no mitigation available other than not using PV devices in case\na backend is suspected to be potentially malicious."
                    }
                ]
            }
        }
    }
}