FKIE_CVE-2016-4480

Vulnerability from fkie_nvd - Published: 2016-05-18 14:59 - Updated: 2025-04-12 10:46
Severity ?
8.4 (High) - CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
cve@mitre.orghttp://www.debian.org/security/2016/dsa-3633
cve@mitre.orghttp://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlVendor Advisory
cve@mitre.orghttp://www.securityfocus.com/bid/90710
cve@mitre.orghttp://www.securitytracker.com/id/1035901
cve@mitre.orghttp://xenbits.xen.org/xsa/advisory-176.htmlVendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2016/dsa-3633
af854a3a-2127-422b-91ae-364da2661108http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlVendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/90710
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1035901
af854a3a-2127-422b-91ae-364da2661108http://xenbits.xen.org/xsa/advisory-176.htmlVendor Advisory
Impacted products
Vendor Product Version
oracle vm_server 3.2
oracle vm_server 3.3
oracle vm_server 3.4
xen xen *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:oracle:vm_server:3.2:*:*:*:*:*:*:*",
              "matchCriteriaId": "5FEC7F7E-AA94-4405-93D6-D0194A37D3C9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:oracle:vm_server:3.3:*:*:*:*:*:*:*",
              "matchCriteriaId": "C2D62B2C-40E5-41B7-9DAA-029BCD079054",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:oracle:vm_server:3.4:*:*:*:*:*:*:*",
              "matchCriteriaId": "4BA58099-26F7-4B01-B9FC-275F012FE9C6",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "AF989165-3B7E-4743-8E97-6558BD164A8F",
              "versionEndIncluding": "4.6.1",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "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."
    },
    {
      "lang": "es",
      "value": "La funci\u00f3n guest_walk_tables en arch/x86/mm/guest_walk en Xen 4.6.x y versiones anteriores no maneja adecuadamente el bit de entrada a la tabla de p\u00e1gina Page Size (PS) en los niveles de tabla de p\u00e1gina L4 y L3, lo que podr\u00eda permitir a usuarios locales hu\u00e9spedes del sistema operativo obtener privilegios a trav\u00e9s de un mapa de memoria manipulado."
    }
  ],
  "id": "CVE-2016-4480",
  "lastModified": "2025-04-12T10:46:40.837",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "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,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "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,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2016-05-18T14:59:05.413",
  "references": [
    {
      "source": "cve@mitre.org",
      "url": "http://www.debian.org/security/2016/dsa-3633"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.securityfocus.com/bid/90710"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://www.securitytracker.com/id/1035901"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "http://xenbits.xen.org/xsa/advisory-176.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.debian.org/security/2016/dsa-3633"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.securityfocus.com/bid/90710"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.securitytracker.com/id/1035901"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "http://xenbits.xen.org/xsa/advisory-176.html"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-264"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.