gsd-2022-33745
Vulnerability from gsd
Modified
2023-12-13 01:19
Details
insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2022-33745",
"description": "insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary.",
"id": "GSD-2022-33745",
"references": [
"https://www.suse.com/security/cve/CVE-2022-33745.html",
"https://www.debian.org/security/2022/dsa-5272"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2022-33745"
],
"details": "insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary.",
"id": "GSD-2022-33745",
"modified": "2023-12-13T01:19:23.292323Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
"cve.org": {
"CVE_data_meta": {
"ASSIGNER": "security@xen.org",
"ID": "CVE-2022-33745",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "xen",
"version": {
"version_data": [
{
"version_affected": "?",
"version_value": "consult Xen advisory XSA-408"
}
]
}
}
]
},
"vendor_name": "Xen"
}
]
}
},
"configuration": {
"configuration_data": {
"description": {
"description_data": [
{
"lang": "eng",
"value": "All versions of Xen with the XSA-401 fixes applied are vulnerable.\n\nOnly x86 PV guests can trigger this vulnerability, and only when running\nin shadow mode. Shadow mode would be in use when migrating guests or as\na workaround for XSA-273 (L1TF)."
}
]
}
}
},
"credit": {
"credit_data": {
"description": {
"description_data": [
{
"lang": "eng",
"value": "This issue was discovered by Charles Arnold of SUSE."
}
]
}
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary."
}
]
},
"impact": {
"impact_data": {
"description": {
"description_data": [
{
"lang": "eng",
"value": "The known (observed) impact would be a Denial of Service (DoS) affecting\nthe entire host, due to running out of memory. Privilege escalation and\ninformation leaks cannot be ruled out."
}
]
}
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "unknown"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://xenbits.xenproject.org/xsa/advisory-408.txt",
"refsource": "MISC",
"url": "https://xenbits.xenproject.org/xsa/advisory-408.txt"
},
{
"name": "http://xenbits.xen.org/xsa/advisory-408.html",
"refsource": "CONFIRM",
"url": "http://xenbits.xen.org/xsa/advisory-408.html"
},
{
"name": "[oss-security] 20220726 Xen Security Advisory 408 v2 (CVE-2022-33745) - insufficient TLB flush for x86 PV guests in shadow mode",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2022/07/26/2"
},
{
"name": "[oss-security] 20220726 Xen Security Advisory 408 v3 (CVE-2022-33745) - insufficient TLB flush for x86 PV guests in shadow mode",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2022/07/26/3"
},
{
"name": "FEDORA-2022-4f7cd241e2",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HUFIMNGYP5VQAA6KE3T2I5GW6UP6F7BS/"
},
{
"name": "FEDORA-2022-a0d7a5eaf2",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MYI3OMJ7RIZNL3C6GUWNANNPEUUID6FM/"
},
{
"name": "DSA-5272",
"refsource": "DEBIAN",
"url": "https://www.debian.org/security/2022/dsa-5272"
}
]
},
"workaround": {
"workaround_data": {
"description": {
"description_data": [
{
"lang": "eng",
"value": "Not running x86 PV guests will avoid the vulnerability."
}
]
}
}
}
},
"nvd.nist.gov": {
"configurations": {
"CVE_data_version": "4.0",
"nodes": [
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*",
"cpe_name": [],
"vulnerable": true
}
],
"operator": "OR"
},
{
"children": [],
"cpe_match": [
{
"cpe23Uri": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
"cpe_name": [],
"vulnerable": true
},
{
"cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",
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},
{
"cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*",
"cpe_name": [],
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"operator": "OR"
}
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},
"cve": {
"CVE_data_meta": {
"ASSIGNER": "security@xen.org",
"ID": "CVE-2022-33745"
},
"data_format": "MITRE",
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"data_version": "4.0",
"description": {
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"value": "insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://xenbits.xenproject.org/xsa/advisory-408.txt",
"refsource": "MISC",
"tags": [
"Vendor Advisory"
],
"url": "https://xenbits.xenproject.org/xsa/advisory-408.txt"
},
{
"name": "http://xenbits.xen.org/xsa/advisory-408.html",
"refsource": "CONFIRM",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "http://xenbits.xen.org/xsa/advisory-408.html"
},
{
"name": "[oss-security] 20220726 Xen Security Advisory 408 v2 (CVE-2022-33745) - insufficient TLB flush for x86 PV guests in shadow mode",
"refsource": "MLIST",
"tags": [
"Mailing List",
"Patch",
"Third Party Advisory"
],
"url": "http://www.openwall.com/lists/oss-security/2022/07/26/2"
},
{
"name": "[oss-security] 20220726 Xen Security Advisory 408 v3 (CVE-2022-33745) - insufficient TLB flush for x86 PV guests in shadow mode",
"refsource": "MLIST",
"tags": [
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"Third Party Advisory"
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"url": "http://www.openwall.com/lists/oss-security/2022/07/26/3"
},
{
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"refsource": "FEDORA",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HUFIMNGYP5VQAA6KE3T2I5GW6UP6F7BS/"
},
{
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"refsource": "FEDORA",
"tags": [
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"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MYI3OMJ7RIZNL3C6GUWNANNPEUUID6FM/"
},
{
"name": "DSA-5272",
"refsource": "DEBIAN",
"tags": [
"Third Party Advisory"
],
"url": "https://www.debian.org/security/2022/dsa-5272"
}
]
}
},
"impact": {
"baseMetricV3": {
"cvssV3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.0,
"impactScore": 6.0
}
},
"lastModifiedDate": "2022-12-12T20:45Z",
"publishedDate": "2022-07-26T13:15Z"
}
}
}
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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.
- 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.