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CERTFR-2022-AVI-535
Vulnerability from certfr_avis - Published: - Updated:
De multiples vulnérabilités ont été découvertes dans Xen. Elles permettent à un attaquant de provoquer une élévation de privilèges.
Solution
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
NoneImpacted products
References
| Title | Publication Time | Tags | ||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Xen toutes versions sans le dernier correctif de s\u00e9curit\u00e9",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"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-2022-26363",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-26363"
},
{
"name": "CVE-2022-26364",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-26364"
},
{
"name": "CVE-2022-26362",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-26362"
}
],
"links": [],
"reference": "CERTFR-2022-AVI-535",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2022-06-10T00:00:00.000000"
}
],
"risks": [
{
"description": "\u00c9l\u00e9vation de privil\u00e8ges"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Xen. Elles\npermettent \u00e0 un attaquant de provoquer une \u00e9l\u00e9vation de privil\u00e8ges.\n",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Xen",
"vendor_advisories": [
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Xen XSA-402 du 09 juin 2022",
"url": "https://xenbits.xen.org/xsa/advisory-402.html"
},
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Xen XSA-401 du 09 juin 2022",
"url": "https://xenbits.xen.org/xsa/advisory-401.html"
}
]
}
CVE-2022-26362 (GCVE-0-2022-26362)
Vulnerability from cvelistv5 – Published: 2022-06-09 12:50 – Updated: 2024-08-03 05:03
VLAI?
EPSS
Summary
x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.
Severity ?
No CVSS data available.
CWE
- unknown
Assigner
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
Credits
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CVE-2022-26364 (GCVE-0-2022-26364)
Vulnerability from cvelistv5 – Published: 2022-06-09 12:50 – Updated: 2024-08-03 05:03
VLAI?
EPSS
Summary
x86 pv: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, Xen's safety logic doesn't account for CPU-induced cache non-coherency; cases where the CPU can cause the content of the cache to be different to the content in main memory. In such cases, Xen's safety logic can incorrectly conclude that the contents of a page is safe.
Severity ?
No CVSS data available.
CWE
- unknown
Assigner
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
Credits
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CVE-2022-26363 (GCVE-0-2022-26363)
Vulnerability from cvelistv5 – Published: 2022-06-09 12:50 – Updated: 2024-08-03 05:03
VLAI?
EPSS
Summary
x86 pv: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, Xen's safety logic doesn't account for CPU-induced cache non-coherency; cases where the CPU can cause the content of the cache to be different to the content in main memory. In such cases, Xen's safety logic can incorrectly conclude that the contents of a page is safe.
Severity ?
No CVSS data available.
CWE
- unknown
Assigner
References
| URL | Tags | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
Credits
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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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