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CERTFR-2021-AVI-460
Vulnerability from certfr_avis
De multiples vulnérabilités ont été découvertes dans Citrix Hypervisor. Elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance et un déni de service à distance.
Solution
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
NoneImpacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| Citrix | Citrix Hypervisor | Citrix XenServer versions 7.1 LTSR CU2 sans le correctif de sécurité XS71ECU2063 | ||
| Citrix | Citrix Hypervisor | Citrix Hypervisor versions 8.2 LTSR sans le correctif de sécurité XS82E026 |
References
| Title | Publication Time | Tags | |||
|---|---|---|---|---|---|
|
|||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Citrix XenServer versions 7.1 LTSR CU2 sans le correctif de s\u00e9curit\u00e9 XS71ECU2063",
"product": {
"name": "Citrix Hypervisor",
"vendor": {
"name": "Citrix",
"scada": false
}
}
},
{
"description": "Citrix Hypervisor versions 8.2 LTSR sans le correctif de s\u00e9curit\u00e9 XS82E026",
"product": {
"name": "Citrix Hypervisor",
"vendor": {
"name": "Citrix",
"scada": false
}
}
}
],
"affected_systems_content": null,
"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",
"cves": [
{
"name": "CVE-2021-0089",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-0089"
},
{
"name": "CVE-2021-28692",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-28692"
},
{
"name": "CVE-2021-26313",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-26313"
},
{
"name": "CVE-2021-27379",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-27379"
}
],
"initial_release_date": "2021-06-11T00:00:00",
"last_revision_date": "2021-06-11T00:00:00",
"links": [],
"reference": "CERTFR-2021-AVI-460",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2021-06-11T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "Ex\u00e9cution de code arbitraire \u00e0 distance"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Citrix Hypervisor.\nElles permettent \u00e0 un attaquant de provoquer une ex\u00e9cution de code\narbitraire \u00e0 distance et un d\u00e9ni de service \u00e0 distance.\n",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Citrix Hypervisor",
"vendor_advisories": [
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Citrix CTX316324 du 09 juin 2021",
"url": "https://support.citrix.com/article/CTX316324"
}
]
}
CVE-2021-27379 (GCVE-0-2021-27379)
Vulnerability from cvelistv5
Published
2021-02-18 15:05
Modified
2024-08-03 20:48
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service (host OS crash) or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct. NOTE: this issue exists because of an incomplete fix for CVE-2020-15565.
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
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CVE-2021-0089 (GCVE-0-2021-0089)
Vulnerability from cvelistv5
Published
2021-06-09 19:07
Modified
2024-08-03 15:25
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- information disclosure
Summary
Observable response discrepancy in some Intel(R) Processors may allow an authorized user to potentially enable information disclosure via local access.
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| n/a | Intel(R) Processors |
Version: See references |
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CVE-2021-28692 (GCVE-0-2021-28692)
Vulnerability from cvelistv5
Published
2021-06-30 10:27
Modified
2024-08-03 21:47
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- unknown
Summary
inappropriate x86 IOMMU timeout detection / handling IOMMUs process commands issued to them in parallel with the operation of the CPU(s) issuing such commands. In the current implementation in Xen, asynchronous notification of the completion of such commands is not used. Instead, the issuing CPU spin-waits for the completion of the most recently issued command(s). Some of these waiting loops try to apply a timeout to fail overly-slow commands. The course of action upon a perceived timeout actually being detected is inappropriate: - on Intel hardware guests which did not originally cause the timeout may be marked as crashed, - on AMD hardware higher layer callers would not be notified of the issue, making them continue as if the IOMMU operation succeeded.
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
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CVE-2021-26313 (GCVE-0-2021-26313)
Vulnerability from cvelistv5
Published
2021-06-09 11:23
Modified
2024-09-16 19:41
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-208 - Information Exposure Through Timing Discrepancy
Summary
Potential speculative code store bypass in all supported CPU products, in conjunction with software vulnerabilities relating to speculative execution of overwritten instructions, may cause an incorrect speculation and could result in data leakage.
References
| URL | Tags | |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| AMD | All supported processors |
Version: unspecified < undefined |
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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