CERTFR-2021-AVI-053

Vulnerability from certfr_avis - Published: 2021-01-22 - Updated: 2021-01-22

De multiples vulnérabilités ont été découvertes dans Xen . Elles permettent à un attaquant de provoquer un déni de service.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Contournement provisoire

  • Désactiver le PCI pass through
  • Xen toutes versions supérieures à 4.13.1 et antérieures à 4.14
  • Xen versions 4.12.3 et 4.12.4

Uniquement les systèmes x86 utilisant un client HVM avec le PCI pass through activé sont vulnérables.

Impacted products
Vendor Product Description
References

Show details on source website

{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [],
  "affected_systems_content": "\u003cul\u003e \u003cli\u003eXen toutes versions sup\u00e9rieures \u00e0 4.13.1 et ant\u00e9rieures \u00e0 4.14\u003c/li\u003e \u003cli\u003eXen versions 4.12.3 et 4.12.4\u003c/li\u003e \u003c/ul\u003e \u003cp\u003eUniquement les syst\u00e8mes x86 utilisant un client HVM avec le PCI \u003cem\u003epass\u00a0through\u003c/em\u003e activ\u00e9 sont vuln\u00e9rables.\u003c/p\u003e ",
  "content": "## Solution\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des\ncorrectifs (cf. section Documentation).\n\n## Contournement provisoire\n\n-   \u00a0D\u00e9sactiver le PCI *pass through*\n",
  "cves": [],
  "initial_release_date": "2021-01-22T00:00:00",
  "last_revision_date": "2021-01-22T00:00:00",
  "links": [],
  "reference": "CERTFR-2021-AVI-053",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2021-01-22T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "D\u00e9ni de service"
    }
  ],
  "summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Xen . Elles\npermettent \u00e0 un attaquant de provoquer un d\u00e9ni de service.\n",
  "title": "Vuln\u00e9rabilit\u00e9 dans Xen",
  "vendor_advisories": [
    {
      "published_at": null,
      "title": "Bulletin de s\u00e9curit\u00e9 Xen advisory-360 du 21 janvier 2021",
      "url": "https://xenbits.xen.org/xsa/advisory-360.html"
    }
  ]
}


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Sightings

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  • 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.
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  • 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.


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