CVE-2017-14318

Published Sep 12, 2017

Last updated 7 years ago

CVSS medium 6.5

Overview

Description: An issue was discovered in Xen 4.5.x through 4.9.x. The function `__gnttab_cache_flush` handles GNTTABOP_cache_flush grant table operations. It checks to see if the calling domain is the owner of the page that is to be operated on. If it is not, the owner's grant table is checked to see if a grant mapping to the calling domain exists for the page in question. However, the function does not check to see if the owning domain actually has a grant table or not. Some special domains, such as `DOMID_XEN`, `DOMID_IO` and `DOMID_COW` are created without grant tables. Hence, if __gnttab_cache_flush operates on a page owned by these special domains, it will attempt to dereference a NULL pointer in the domain struct.
Source: cve@mitre.org
NVD status: Modified

Risk scores

CVSS 3.0

Type: Primary
Base score: 6.5
Impact score: 4
Exploitability score: 2
Vector string: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Severity: MEDIUM

CVSS 2.0

Type: Primary
Base score: 4.9
Impact score: 6.9
Exploitability score: 3.9
Vector string: AV:L/AC:L/Au:N/C:N/I:N/A:C

Weaknesses

nvd@nist.gov: CWE-476

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "negate": false,
        "cpeMatch": [
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            "vulnerable": true,
            "matchCriteriaId": "90CCECD0-C0F9-45A8-8699-64428637EBCA"
          },
          {
            "criteria": "cpe:2.3:o:xen:xen:4.5.1:*:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "F0ED340C-6746-471E-9F2D-19D62D224B7A"
          },
          {
            "criteria": "cpe:2.3:o:xen:xen:4.5.2:*:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "99BD7C4F-DE4C-4508-B20D-46A94B616C5B"
          },
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          {
            "criteria": "cpe:2.3:o:xen:xen:4.9.0:*:*:*:*:*:*:*",
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        "operator": "OR"
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    ]
  }
]

Overview

Risk scores

CVSS 3.0

CVSS 2.0

Weaknesses

Social media

Configurations

References