Executive Summary
Informations | |||
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Name | CVE-2021-28694 | First vendor Publication | 2021-08-27 |
Vendor | Cve | Last vendor Modification | 2023-11-07 |
Security-Database Scoring CVSS v3
Cvss vector : CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | |||
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Overall CVSS Score | 6.8 | ||
Base Score | 6.8 | Environmental Score | 6.8 |
impact SubScore | 5.9 | Temporal Score | 6.8 |
Exploitabality Sub Score | 0.9 | ||
Attack Vector | Physical | Attack Complexity | Low |
Privileges Required | None | User Interaction | None |
Scope | Unchanged | Confidentiality Impact | High |
Integrity Impact | High | Availability Impact | High |
Calculate full CVSS 3.0 Vectors scores |
Security-Database Scoring CVSS v2
Cvss vector : (AV:L/AC:L/Au:N/C:P/I:P/A:P) | |||
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Cvss Base Score | 4.6 | Attack Range | Local |
Cvss Impact Score | 6.4 | Attack Complexity | Low |
Cvss Expoit Score | 3.9 | Authentication | None Required |
Calculate full CVSS 2.0 Vectors scores |
Detail
IOMMU page mapping issues on x86 T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Both AMD and Intel allow ACPI tables to specify regions of memory which should be left untranslated, which typically means these addresses should pass the translation phase unaltered. While these are typically device specific ACPI properties, they can also be specified to apply to a range of devices, or even all devices. On all systems with such regions Xen failed to prevent guests from undoing/replacing such mappings (CVE-2021-28694). On AMD systems, where a discontinuous range is specified by firmware, the supposedly-excluded middle range will also be identity-mapped (CVE-2021-28695). Further, on AMD systems, upon de-assigment of a physical device from a guest, the identity mappings would be left in place, allowing a guest continued access to ranges of memory which it shouldn't have access to anymore (CVE-2021-28696). |
Original Source
Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28694 |
CPE : Common Platform Enumeration
Type | Description | Count |
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Os | 1 | |
Os | 3 | |
Os | 1 |
Sources (Detail)
Alert History
Date | Informations |
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2023-11-07 21:34:08 |
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2022-09-29 00:28:04 |
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2022-08-15 17:27:48 |
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2022-07-13 17:27:39 |
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2021-12-15 00:23:01 |
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2021-09-25 05:23:07 |
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2021-09-21 17:23:03 |
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2021-09-15 00:23:03 |
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2021-09-06 05:22:50 |
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2021-09-02 00:22:54 |
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2021-09-01 21:23:12 |
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2021-09-01 17:23:03 |
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2021-08-28 09:22:50 |
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2021-08-28 00:22:49 |
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