gsd-2016-4480
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory.
Aliases
Aliases
CVE-2016-4480


To clipboard 

{
  "GSD": {
    "alias": "CVE-2016-4480",
    "description": "The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory.",
    "id": "GSD-2016-4480",
    "references": [
      "https://www.suse.com/security/cve/CVE-2016-4480.html",
      "https://www.debian.org/security/2016/dsa-3633",
      "https://advisories.mageia.org/CVE-2016-4480.html",
      "https://linux.oracle.com/cve/CVE-2016-4480.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2016-4480"
      ],
      "details": "The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory.",
      "id": "GSD-2016-4480",
      "modified": "2023-12-13T01:21:18.468523Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2016-4480",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "n/a",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "n/a"
                        }
                      ]
                    }
                  }
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              },
              "vendor_name": "n/a"
            }
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          }
        ]
      },
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                "value": "n/a"
              }
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          }
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      },
      "references": {
        "reference_data": [
          {
            "name": "http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html",
            "refsource": "CONFIRM",
            "url": "http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html"
          },
          {
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            "url": "http://www.securityfocus.com/bid/90710"
          },
          {
            "name": "1035901",
            "refsource": "SECTRACK",
            "url": "http://www.securitytracker.com/id/1035901"
          },
          {
            "name": "DSA-3633",
            "refsource": "DEBIAN",
            "url": "http://www.debian.org/security/2016/dsa-3633"
          },
          {
            "name": "http://xenbits.xen.org/xsa/advisory-176.html",
            "refsource": "CONFIRM",
            "url": "http://xenbits.xen.org/xsa/advisory-176.html"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:oracle:vm_server:3.4:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:oracle:vm_server:3.2:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:oracle:vm_server:3.3:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndIncluding": "4.6.1",
                "vulnerable": true
              }
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            "operator": "OR"
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        ]
      },
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          "ID": "CVE-2016-4480"
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        "data_type": "CVE",
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        "description": {
          "description_data": [
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              "lang": "en",
              "value": "The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-264"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "http://xenbits.xen.org/xsa/advisory-176.html",
              "refsource": "CONFIRM",
              "tags": [
                "Vendor Advisory"
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              "url": "http://xenbits.xen.org/xsa/advisory-176.html"
            },
            {
              "name": "http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html",
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              "url": "http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html"
            },
            {
              "name": "DSA-3633",
              "refsource": "DEBIAN",
              "tags": [],
              "url": "http://www.debian.org/security/2016/dsa-3633"
            },
            {
              "name": "90710",
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              "tags": [],
              "url": "http://www.securityfocus.com/bid/90710"
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              "refsource": "SECTRACK",
              "tags": [],
              "url": "http://www.securitytracker.com/id/1035901"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 7.2,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 10.0,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          "exploitabilityScore": 2.5,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2016-12-01T03:10Z",
      "publishedDate": "2016-05-18T14:59Z"
    }
  }
}


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