cve-2021-28693
Vulnerability from cvelistv5
Published
2021-06-30 10:32
Modified
2024-08-03 21:47
Severity ?
EPSS score ?
Summary
xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs...) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must "scrub" them before handing the page over to the allocator. Unfortunately, it was discovered that modules will not be scrubbed on Arm.
References
| ▼ | URL | Tags | |
|---|---|---|---|
| security@xen.org | https://security.gentoo.org/glsa/202107-30 | Third Party Advisory | |
| security@xen.org | https://xenbits.xenproject.org/xsa/advisory-372.txt | Vendor Advisory |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T21:47:33.196Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://xenbits.xenproject.org/xsa/advisory-372.txt"
},
{
"name": "GLSA-202107-30",
"tags": [
"vendor-advisory",
"x_refsource_GENTOO",
"x_transferred"
],
"url": "https://security.gentoo.org/glsa/202107-30"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "xen",
"vendor": "Xen",
"versions": [
{
"status": "affected",
"version": "4.15.x"
}
]
},
{
"product": "xen",
"vendor": "Xen",
"versions": [
{
"lessThan": "4.12",
"status": "unknown",
"version": "unspecified",
"versionType": "custom"
},
{
"lessThan": "unspecified",
"status": "affected",
"version": "4.13.x",
"versionType": "custom"
},
{
"lessThan": "unspecified",
"status": "unaffected",
"version": "next of 4.14.x",
"versionType": "custom"
}
]
},
{
"product": "xen",
"vendor": "Xen",
"versions": [
{
"status": "affected",
"version": "xen-unstable"
}
]
},
{
"product": "xen",
"vendor": "Xen",
"versions": [
{
"status": "affected",
"version": "4.12.x"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "{\u0027credit_data\u0027: {\u0027description\u0027: {\u0027description_data\u0027: [{\u0027lang\u0027: \u0027eng\u0027, \u0027value\u0027: \u0027This issue was discovered by Julien Grall of Amazon.\u0027}]}}}"
}
],
"descriptions": [
{
"lang": "en",
"value": "xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs...) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must \"scrub\" them before handing the page over to the allocator. Unfortunately, it was discovered that modules will not be scrubbed on Arm."
}
],
"metrics": [
{
"other": {
"content": {
"description": {
"description_data": [
{
"lang": "eng",
"value": "Sensitive information from the boot modules might be visible to another\ndomain after boot."
}
]
}
},
"type": "unknown"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "unknown",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-07-12T04:06:37",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://xenbits.xenproject.org/xsa/advisory-372.txt"
},
{
"name": "GLSA-202107-30",
"tags": [
"vendor-advisory",
"x_refsource_GENTOO"
],
"url": "https://security.gentoo.org/glsa/202107-30"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "security@xen.org",
"ID": "CVE-2021-28693",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "xen",
"version": {
"version_data": [
{
"version_value": "4.15.x"
}
]
}
},
{
"product_name": "xen",
"version": {
"version_data": [
{
"version_affected": "?\u003c",
"version_value": "4.12"
},
{
"version_affected": "\u003e=",
"version_value": "4.13.x"
},
{
"version_affected": "!\u003e",
"version_value": "4.14.x"
}
]
}
},
{
"product_name": "xen",
"version": {
"version_data": [
{
"version_value": "xen-unstable"
}
]
}
},
{
"product_name": "xen",
"version": {
"version_data": [
{
"version_value": "4.12.x"
}
]
}
}
]
},
"vendor_name": "Xen"
}
]
}
},
"configuration": {
"configuration_data": {
"description": {
"description_data": [
{
"lang": "eng",
"value": "Only Arm systems are vulnerable. System running with \"bootscrub=off\"\n(disabling boot scrubbing) are not vulnerable.\n\nAll versions of Xen since 4.12 are vulnerable."
}
]
}
}
},
"credit": {
"credit_data": {
"description": {
"description_data": [
{
"lang": "eng",
"value": "This issue was discovered by Julien Grall of Amazon."
}
]
}
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs...) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must \"scrub\" them before handing the page over to the allocator. Unfortunately, it was discovered that modules will not be scrubbed on Arm."
}
]
},
"impact": {
"impact_data": {
"description": {
"description_data": [
{
"lang": "eng",
"value": "Sensitive information from the boot modules might be visible to another\ndomain after boot."
}
]
}
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "unknown"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://xenbits.xenproject.org/xsa/advisory-372.txt",
"refsource": "MISC",
"url": "https://xenbits.xenproject.org/xsa/advisory-372.txt"
},
{
"name": "GLSA-202107-30",
"refsource": "GENTOO",
"url": "https://security.gentoo.org/glsa/202107-30"
}
]
},
"workaround": {
"workaround_data": {
"description": {
"description_data": [
{
"lang": "eng",
"value": "There is no mitigation available."
}
]
}
}
}
}
}
},
"cveMetadata": {
"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
"cveId": "CVE-2021-28693",
"datePublished": "2021-06-30T10:32:26",
"dateReserved": "2021-03-18T00:00:00",
"dateUpdated": "2024-08-03T21:47:33.196Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2021-28693\",\"sourceIdentifier\":\"security@xen.org\",\"published\":\"2021-06-30T11:15:08.117\",\"lastModified\":\"2021-09-21T16:14:49.083\",\"vulnStatus\":\"Analyzed\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs...) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must \\\"scrub\\\" them before handing the page over to the allocator. Unfortunately, it was discovered that modules will not be scrubbed on Arm.\"},{\"lang\":\"es\",\"value\":\"xen/arm: Los m\u00f3dulos de arranque no se limpian. El cargador de arranque cargar\u00e1 los m\u00f3dulos de arranque (por ejemplo, kernel, initramfs...) en un \u00e1rea temporal antes de que sean copiados por Xen a la memoria de cada dominio. Para asegurar que no se filtren datos confidenciales de los m\u00f3dulos, Xen debe \\\"scrub\\\" antes de entregar la p\u00e1gina al asignador. Desgraciadamente, se ha detectado que los m\u00f3dulos no se limpian en Arm\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:L/Au:N/C:P/I:N/A:N\",\"accessVector\":\"LOCAL\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\",\"baseScore\":2.1},\"baseSeverity\":\"LOW\",\"exploitabilityScore\":3.9,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.12.0\",\"versionEndIncluding\":\"4.15.0\",\"matchCriteriaId\":\"9B62AF81-A6D2-4755-915B-F4C94959F635\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:xen:xen:4.15.0:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"68E7691E-21CB-46E3-823B-4262C9E5C33E\"}]}]}],\"references\":[{\"url\":\"https://security.gentoo.org/glsa/202107-30\",\"source\":\"security@xen.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://xenbits.xenproject.org/xsa/advisory-372.txt\",\"source\":\"security@xen.org\",\"tags\":[\"Vendor Advisory\"]}]}}"
}
}
Loading...
Loading...
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.