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CERTFR-2016-AVI-389
Vulnerability from certfr_avis
De multiples vulnérabilités ont été corrigées dans Citrix XenServer. Elles permettent à un attaquant de provoquer une exécution de code arbitraire et un déni de service.
Solution
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Citrix XenServer toutes versions sans le dernier correctif de sécurité
Impacted products
| Vendor | Product | Description |
|---|
References
| Title | Publication Time | Tags | |||
|---|---|---|---|---|---|
|
|||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [],
"affected_systems_content": "\u003cP\u003eCitrix XenServer toutes versions sans le dernier correctif de s\u00e9curit\u00e9\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",
"cves": [
{
"name": "CVE-2016-9386",
"url": "https://www.cve.org/CVERecord?id=CVE-2016-9386"
},
{
"name": "CVE-2016-9383",
"url": "https://www.cve.org/CVERecord?id=CVE-2016-9383"
},
{
"name": "CVE-2016-9382",
"url": "https://www.cve.org/CVERecord?id=CVE-2016-9382"
},
{
"name": "CVE-2016-9380",
"url": "https://www.cve.org/CVERecord?id=CVE-2016-9380"
},
{
"name": "CVE-2016-9379",
"url": "https://www.cve.org/CVERecord?id=CVE-2016-9379"
},
{
"name": "CVE-2016-9385",
"url": "https://www.cve.org/CVERecord?id=CVE-2016-9385"
},
{
"name": "CVE-2016-9381",
"url": "https://www.cve.org/CVERecord?id=CVE-2016-9381"
}
],
"initial_release_date": "2016-11-25T00:00:00",
"last_revision_date": "2016-11-25T00:00:00",
"links": [],
"reference": "CERTFR-2016-AVI-389",
"revisions": [
{
"description": "version initiale.",
"revision_date": "2016-11-25T00:00:00.000000"
}
],
"risks": [
{
"description": "Ex\u00e9cution de code arbitraire"
},
{
"description": "D\u00e9ni de service"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 corrig\u00e9es dans \u003cspan\nclass=\"textit\"\u003eCitrix XenServer\u003c/span\u003e. Elles permettent \u00e0 un attaquant\nde provoquer une ex\u00e9cution de code arbitraire et un d\u00e9ni de service.\n",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Citrix XenServer",
"vendor_advisories": [
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Citrix CTX218775 du 22 novembre 2016",
"url": "https://support.citrix.com/article/CTX218775"
}
]
}
CVE-2016-9386 (GCVE-0-2016-9386)
Vulnerability from cvelistv5
Published
2017-01-23 21:00
Modified
2024-08-06 02:50
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
The x86 emulator in Xen does not properly treat x86 NULL segments as unusable when accessing memory, which might allow local HVM guest users to gain privileges via vectors involving "unexpected" base/limit values.
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
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CVE-2016-9385 (GCVE-0-2016-9385)
Vulnerability from cvelistv5
Published
2017-01-23 21:00
Modified
2024-08-06 02:50
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
The x86 segment base write emulation functionality in Xen 4.4.x through 4.7.x allows local x86 PV guest OS administrators to cause a denial of service (host crash) by leveraging lack of canonical address checks.
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
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CVE-2016-9380 (GCVE-0-2016-9380)
Vulnerability from cvelistv5
Published
2017-01-23 21:00
Modified
2024-08-06 02:50
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
The pygrub boot loader emulator in Xen, when nul-delimited output format is requested, allows local pygrub-using guest OS administrators to read or delete arbitrary files on the host via NUL bytes in the bootloader configuration file.
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
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CVE-2016-9383 (GCVE-0-2016-9383)
Vulnerability from cvelistv5
Published
2017-01-23 21:00
Modified
2024-08-06 02:50
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
Xen, when running on a 64-bit hypervisor, allows local x86 guest OS users to modify arbitrary memory and consequently obtain sensitive information, cause a denial of service (host crash), or execute arbitrary code on the host by leveraging broken emulation of bit test instructions.
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
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CVE-2016-9382 (GCVE-0-2016-9382)
Vulnerability from cvelistv5
Published
2017-01-23 21:00
Modified
2024-08-06 02:50
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode.
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CVE-2016-9379 (GCVE-0-2016-9379)
Vulnerability from cvelistv5
Published
2017-01-23 21:00
Modified
2024-08-06 02:50
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
The pygrub boot loader emulator in Xen, when S-expression output format is requested, allows local pygrub-using guest OS administrators to read or delete arbitrary files on the host via string quotes and S-expressions in the bootloader configuration file.
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CVE-2016-9381 (GCVE-0-2016-9381)
Vulnerability from cvelistv5
Published
2017-01-23 21:00
Modified
2024-08-06 02:50
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- n/a
Summary
Race condition in QEMU in Xen allows local x86 HVM guest OS administrators to gain privileges by changing certain data on shared rings, aka a "double fetch" vulnerability.
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| URL | Tags | ||||||||||||||||
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"url": "https://support.citrix.com/article/CTX218775"
},
{
"name": "1037344",
"refsource": "SECTRACK",
"url": "http://www.securitytracker.com/id/1037344"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2016-9381",
"datePublished": "2017-01-23T21:00:00",
"dateReserved": "2016-11-17T00:00:00",
"dateUpdated": "2024-08-06T02:50:37.693Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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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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