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CERTFR-2016-AVI-389
Vulnerability from certfr_avis - Published: - Updated:
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"
}
],
"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-2016-9380 (GCVE-0-2016-9380)
Vulnerability from cvelistv5 – Published: 2017-01-23 21:00 – Updated: 2024-08-06 02:50
VLAI?
EPSS
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.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2016-9385 (GCVE-0-2016-9385)
Vulnerability from cvelistv5 – Published: 2017-01-23 21:00 – Updated: 2024-08-06 02:50
VLAI?
EPSS
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.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2016-9383 (GCVE-0-2016-9383)
Vulnerability from cvelistv5 – Published: 2017-01-23 21:00 – Updated: 2024-08-06 02:50
VLAI?
EPSS
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.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2016-9382 (GCVE-0-2016-9382)
Vulnerability from cvelistv5 – Published: 2017-01-23 21:00 – Updated: 2024-08-06 02:50
VLAI?
EPSS
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.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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|||||||||||||||||
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CVE-2016-9379 (GCVE-0-2016-9379)
Vulnerability from cvelistv5 – Published: 2017-01-23 21:00 – Updated: 2024-08-06 02:50
VLAI?
EPSS
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.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2016-9381 (GCVE-0-2016-9381)
Vulnerability from cvelistv5 – Published: 2017-01-23 21:00 – Updated: 2024-08-06 02:50
VLAI?
EPSS
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.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
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| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2016-9386 (GCVE-0-2016-9386)
Vulnerability from cvelistv5 – Published: 2017-01-23 21:00 – Updated: 2024-08-06 02:50
VLAI?
EPSS
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.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
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| URL | Tags | ||||||||||||||||
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"url": "http://xenbits.xen.org/xsa/advisory-191.html"
},
{
"name": "1037340",
"refsource": "SECTRACK",
"url": "http://www.securitytracker.com/id/1037340"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2016-9386",
"datePublished": "2017-01-23T21:00:00",
"dateReserved": "2016-11-17T00:00:00",
"dateUpdated": "2024-08-06T02:50:37.602Z",
"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 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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