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
| Title | Publication Time | Tags | |||
|---|---|---|---|---|---|
|
|||||
{
"$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
| 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.
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