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ubuntu-cve-2016-9602
Vulnerability from osv_ubuntu
Published
2016-12-31 00:00
Modified
2025-09-08 16:43
Summary
Details

Qemu before version 2.9 is vulnerable to an improper link following when built with the VirtFS. A privileged user inside guest could use this flaw to access host file system beyond the shared folder and potentially escalating their privileges on a host.

Severity
8.8 (High)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.6 (High)
CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "qemu",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          },
          {
            "binary_name": "qemu-common",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          },
          {
            "binary_name": "qemu-guest-agent",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          },
          {
            "binary_name": "qemu-keymaps",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          },
          {
            "binary_name": "qemu-kvm",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          },
          {
            "binary_name": "qemu-system",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          },
          {
            "binary_name": "qemu-system-aarch64",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          },
          {
            "binary_name": "qemu-system-arm",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          },
          {
            "binary_name": "qemu-system-common",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          },
          {
            "binary_name": "qemu-system-mips",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          },
          {
            "binary_name": "qemu-system-misc",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          },
          {
            "binary_name": "qemu-system-ppc",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          },
          {
            "binary_name": "qemu-system-sparc",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          },
          {
            "binary_name": "qemu-system-x86",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          },
          {
            "binary_name": "qemu-user",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          },
          {
            "binary_name": "qemu-user-static",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          },
          {
            "binary_name": "qemu-utils",
            "binary_version": "2.0.0+dfsg-2ubuntu1.33"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "qemu",
        "purl": "pkg:deb/ubuntu/qemu@2.0.0+dfsg-2ubuntu1.33?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.0+dfsg-2ubuntu1.33"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5.0+dfsg-3ubuntu5",
        "1.5.0+dfsg-3ubuntu6",
        "1.6.0+dfsg-2ubuntu1",
        "1.6.0+dfsg-2ubuntu2",
        "1.6.0+dfsg-2ubuntu3",
        "1.6.0+dfsg-2ubuntu4",
        "1.7.0+dfsg-2ubuntu1",
        "1.7.0+dfsg-2ubuntu2",
        "1.7.0+dfsg-2ubuntu3",
        "1.7.0+dfsg-2ubuntu4",
        "1.7.0+dfsg-2ubuntu5",
        "1.7.0+dfsg-2ubuntu7",
        "1.7.0+dfsg-2ubuntu8",
        "1.7.0+dfsg-2ubuntu9",
        "1.7.0+dfsg-3ubuntu1~ppa1",
        "1.7.0+dfsg-3ubuntu1",
        "1.7.0+dfsg-3ubuntu2",
        "1.7.0+dfsg-3ubuntu3",
        "1.7.0+dfsg-3ubuntu4",
        "1.7.0+dfsg-3ubuntu5",
        "1.7.0+dfsg-3ubuntu6",
        "1.7.0+dfsg-3ubuntu7",
        "2.0.0~rc1+dfsg-0ubuntu1",
        "2.0.0~rc1+dfsg-0ubuntu2",
        "2.0.0~rc1+dfsg-0ubuntu3",
        "2.0.0~rc1+dfsg-0ubuntu3.1",
        "2.0.0+dfsg-2ubuntu1",
        "2.0.0+dfsg-2ubuntu1.1",
        "2.0.0+dfsg-2ubuntu1.2",
        "2.0.0+dfsg-2ubuntu1.3",
        "2.0.0+dfsg-2ubuntu1.5",
        "2.0.0+dfsg-2ubuntu1.6",
        "2.0.0+dfsg-2ubuntu1.7",
        "2.0.0+dfsg-2ubuntu1.8",
        "2.0.0+dfsg-2ubuntu1.9",
        "2.0.0+dfsg-2ubuntu1.10",
        "2.0.0+dfsg-2ubuntu1.11",
        "2.0.0+dfsg-2ubuntu1.13",
        "2.0.0+dfsg-2ubuntu1.14",
        "2.0.0+dfsg-2ubuntu1.15",
        "2.0.0+dfsg-2ubuntu1.16",
        "2.0.0+dfsg-2ubuntu1.17",
        "2.0.0+dfsg-2ubuntu1.18",
        "2.0.0+dfsg-2ubuntu1.19",
        "2.0.0+dfsg-2ubuntu1.20",
        "2.0.0+dfsg-2ubuntu1.21",
        "2.0.0+dfsg-2ubuntu1.22",
        "2.0.0+dfsg-2ubuntu1.24",
        "2.0.0+dfsg-2ubuntu1.25",
        "2.0.0+dfsg-2ubuntu1.26",
        "2.0.0+dfsg-2ubuntu1.27",
        "2.0.0+dfsg-2ubuntu1.28",
        "2.0.0+dfsg-2ubuntu1.29",
        "2.0.0+dfsg-2ubuntu1.30",
        "2.0.0+dfsg-2ubuntu1.31",
        "2.0.0+dfsg-2ubuntu1.32"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "qemu",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-block-extra",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-guest-agent",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-kvm",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-system",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-system-aarch64",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-system-arm",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-system-common",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-system-mips",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-system-misc",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-system-ppc",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-system-s390x",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-system-sparc",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-system-x86",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-user",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-user-binfmt",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-user-static",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          },
          {
            "binary_name": "qemu-utils",
            "binary_version": "1:2.5+dfsg-5ubuntu10.11"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "qemu",
        "purl": "pkg:deb/ubuntu/qemu@1:2.5+dfsg-5ubuntu10.11?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:2.5+dfsg-5ubuntu10.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:2.3+dfsg-5ubuntu9",
        "1:2.3+dfsg-5ubuntu10",
        "1:2.4+dfsg-4ubuntu1",
        "1:2.4+dfsg-4ubuntu2",
        "1:2.4+dfsg-4ubuntu3",
        "1:2.4+dfsg-5ubuntu3",
        "1:2.5+dfsg-1ubuntu2",
        "1:2.5+dfsg-1ubuntu3",
        "1:2.5+dfsg-1ubuntu4",
        "1:2.5+dfsg-1ubuntu5",
        "1:2.5+dfsg-5ubuntu1",
        "1:2.5+dfsg-5ubuntu2",
        "1:2.5+dfsg-5ubuntu4",
        "1:2.5+dfsg-5ubuntu6",
        "1:2.5+dfsg-5ubuntu7",
        "1:2.5+dfsg-5ubuntu10",
        "1:2.5+dfsg-5ubuntu10.1",
        "1:2.5+dfsg-5ubuntu10.2",
        "1:2.5+dfsg-5ubuntu10.3",
        "1:2.5+dfsg-5ubuntu10.4",
        "1:2.5+dfsg-5ubuntu10.5",
        "1:2.5+dfsg-5ubuntu10.6",
        "1:2.5+dfsg-5ubuntu10.7",
        "1:2.5+dfsg-5ubuntu10.8",
        "1:2.5+dfsg-5ubuntu10.9",
        "1:2.5+dfsg-5ubuntu10.10"
      ]
    }
  ],
  "aliases": [],
  "details": "Qemu before version 2.9 is vulnerable to an improper link following when built with the VirtFS. A privileged user inside guest could use this flaw to access host file system beyond the shared folder and potentially escalating their privileges on a host.",
  "id": "UBUNTU-CVE-2016-9602",
  "modified": "2025-09-08T16:43:56Z",
  "published": "2016-12-31T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-9602"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2017/01/17/12"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2017/01/17/14"
    },
    {
      "type": "REPORT",
      "url": "https://lists.gnu.org/archive/html/qemu-devel/2017-02/msg04347.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3261-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3268-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2016-9602"
    }
  ],
  "related": [
    "USN-3261-1",
    "USN-3268-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2016-9602"
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.