GSD-2022-42335
Vulnerability from gsd - Updated: 2023-12-13 01:19Details
x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2022-42335",
"id": "GSD-2022-42335"
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
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"aliases": [
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],
"details": "x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control.",
"id": "GSD-2022-42335",
"modified": "2023-12-13T01:19:10.859323Z",
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}
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"affects": {
"vendor": {
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{
"product": {
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"product_name": "xen",
"version": {
"version_data": [
{
"version_affected": "?",
"version_value": "consult Xen advisory XSA-430"
}
]
}
}
]
},
"vendor_name": "Xen"
}
]
}
},
"configuration": {
"configuration_data": {
"description": {
"description_data": [
{
"lang": "eng",
"value": "Only Xen version 4.17 is vulnerable.\n\nOnly x86 systems are vulnerable. The vulnerability can be leveraged only\nby HVM guests running with shadow paging and having a PCI device passed\nthrough."
}
]
}
}
},
"credit": {
"credit_data": {
"description": {
"description_data": [
{
"lang": "eng",
"value": "This issue was discovered by Roger Pau Monn\u00e9 of XenServer."
}
]
}
}
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"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
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"lang": "eng",
"value": "x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control."
}
]
},
"impact": {
"impact_data": {
"description": {
"description_data": [
{
"lang": "eng",
"value": "Guests running in shadow mode and having a PCI device passed through may be\nable to cause Denial of Service and other problems, escalation of privilege\ncannot be ruled out."
}
]
}
}
},
"problemtype": {
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"description": [
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"value": "unknown"
}
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"name": "https://xenbits.xenproject.org/xsa/advisory-430.txt",
"refsource": "MISC",
"url": "https://xenbits.xenproject.org/xsa/advisory-430.txt"
},
{
"name": "http://xenbits.xen.org/xsa/advisory-430.html",
"refsource": "CONFIRM",
"url": "http://xenbits.xen.org/xsa/advisory-430.html"
},
{
"name": "[oss-security] 20230425 Xen Security Advisory 430 v2 (CVE-2022-42335) - x86 shadow paging arbitrary pointer dereference",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2023/04/25/1"
},
{
"name": "FEDORA-2023-d28433ead1",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PSPFWSY6UOPGMADQGOGN2PAAS5LJRPTG/"
},
{
"name": "GLSA-202402-07",
"refsource": "GENTOO",
"url": "https://security.gentoo.org/glsa/202402-07"
}
]
},
"workaround": {
"workaround_data": {
"description": {
"description_data": [
{
"lang": "eng",
"value": "Not passing through PCI devices to HVM guests will avoid the vulnerability.\n\nRunning HVM guests only in HAP (Hardware Assisted Paging) mode will also\navoid the vulnerability."
}
]
}
}
}
},
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"cve": {
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"value": "x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control."
}
],
"id": "CVE-2022-42335",
"lastModified": "2024-02-04T08:15:13.520",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"source": "nvd@nist.gov",
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"published": "2023-04-25T13:15:09.643",
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"tags": [
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"url": "http://www.openwall.com/lists/oss-security/2023/04/25/1"
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"vulnStatus": "Modified",
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"value": "CWE-476"
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"source": "nvd@nist.gov",
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}
}
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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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