cvelist/2020/15xxx/CVE-2020-15564.json

{
    "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2020-15564",
        "STATE": "PUBLIC"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "n/a",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "n/a"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "n/a"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "An issue was discovered in Xen through 4.13.x, allowing Arm guest OS users to cause a hypervisor crash because of a missing alignment check in VCPUOP_register_vcpu_info. The hypercall VCPUOP_register_vcpu_info is used by a guest to register a shared region with the hypervisor. The region will be mapped into Xen address space so it can be directly accessed. On Arm, the region is accessed with instructions that require a specific alignment. Unfortunately, there is no check that the address provided by the guest will be correctly aligned. As a result, a malicious guest could cause a hypervisor crash by passing a misaligned address. A malicious guest administrator may cause a hypervisor crash, resulting in a Denial of Service (DoS). All Xen versions are vulnerable. Only Arm systems are vulnerable. x86 systems are not affected."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "url": "http://xenbits.xen.org/xsa/advisory-327.html",
                "refsource": "MISC",
                "name": "http://xenbits.xen.org/xsa/advisory-327.html"
            },
            {
                "refsource": "MLIST",
                "name": "[oss-security] 20200707 Xen Security Advisory 327 v3 (CVE-2020-15564) - Missing alignment check in VCPUOP_register_vcpu_info",
                "url": "http://www.openwall.com/lists/oss-security/2020/07/07/5"
            },
            {
                "refsource": "DEBIAN",
                "name": "DSA-4723",
                "url": "https://www.debian.org/security/2020/dsa-4723"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2020-fbc13516af",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VB3QJJZV23Z2IDYEMIHELWYSQBUEW6JP/"
            },
            {
                "refsource": "FEDORA",
                "name": "FEDORA-2020-76cf2b0f0a",
                "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MXESCOVI7AVRNC7HEAMFM7PMEO6D3AUH/"
            },
            {
                "refsource": "GENTOO",
                "name": "GLSA-202007-02",
                "url": "https://security.gentoo.org/glsa/202007-02"
            }
        ]
    }
}