github - ghsa-c6pm-8crm-3rr8

GHSA-C6PM-8CRM-3RR8

Vulnerability from github – Published: 2022-05-17 00:24 – Updated: 2022-05-17 00:24

Details

Xen maintains the GTF{read,writ}ing bits as appropriate, to inform the guest that a grant is in use. A guest is expected not to modify the grant details while it is in use, whereas the guest is free to modify/reuse the grant entry when it is not in use. Under some circumstances, Xen will clear the status bits too early, incorrectly informing the guest that the grant is no longer in use. A guest may prematurely believe that a granted frame is safely private again, and reuse it in a way which contains sensitive information, while the domain on the far end of the grant is still using the grant. Xen 4.9, 4.8, 4.7, 4.6, and 4.5 are affected.

Severity ?

6.5 (Medium)


                  
                    CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2017-12855"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-200"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-08-15T16:29:00Z",
    "severity": "MODERATE"
  },
  "details": "Xen maintains the _GTF_{read,writ}ing bits as appropriate, to inform the guest that a grant is in use. A guest is expected not to modify the grant details while it is in use, whereas the guest is free to modify/reuse the grant entry when it is not in use. Under some circumstances, Xen will clear the status bits too early, incorrectly informing the guest that the grant is no longer in use. A guest may prematurely believe that a granted frame is safely private again, and reuse it in a way which contains sensitive information, while the domain on the far end of the grant is still using the grant. Xen 4.9, 4.8, 4.7, 4.6, and 4.5 are affected.",
  "id": "GHSA-c6pm-8crm-3rr8",
  "modified": "2022-05-17T00:24:10Z",
  "published": "2022-05-17T00:24:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-12855"
    },
    {
      "type": "WEB",
      "url": "https://support.citrix.com/article/CTX225941"
    },
    {
      "type": "WEB",
      "url": "http://www.debian.org/security/2017/dsa-3969"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/100341"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1039177"
    },
    {
      "type": "WEB",
      "url": "http://xenbits.xen.org/xsa/advisory-230.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2017-12855 (GCVE-0-2017-12855)

Vulnerability from cvelistv5 – Published: 2017-08-15 16:00 – Updated: 2024-08-05 18:51

Summary

Xen maintains the _GTF_{read,writ}ing bits as appropriate, to inform the guest that a grant is in use. A guest is expected not to modify the grant details while it is in use, whereas the guest is free to modify/reuse the grant entry when it is not in use. Under some circumstances, Xen will clear the status bits too early, incorrectly informing the guest that the grant is no longer in use. A guest may prematurely believe that a granted frame is safely private again, and reuse it in a way which contains sensitive information, while the domain on the far end of the grant is still using the grant. Xen 4.9, 4.8, 4.7, 4.6, and 4.5 are affected.

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	https://support.citrix.com/article/CTX225941	x_refsource_CONFIRM
	http://www.securitytracker.com/id/1039177	vdb-entryx_refsource_SECTRACK
	http://www.securityfocus.com/bid/100341	vdb-entryx_refsource_BID
	http://www.debian.org/security/2017/dsa-3969	vendor-advisoryx_refsource_DEBIAN
	http://xenbits.xen.org/xsa/advisory-230.html	x_refsource_CONFIRM

Show details on NVD website

JSON

To clipboard

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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.

Action not permitted

GHSA-C6PM-8CRM-3RR8

CVE-2017-12855 (GCVE-0-2017-12855)

Tags

Sightings

Nomenclature