Executive Summary
Informations | |||
---|---|---|---|
Name | CVE-2022-42332 | First vendor Publication | 2023-03-21 |
Vendor | Cve | Last vendor Modification | 2024-02-04 |
Security-Database Scoring CVSS v3
Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | |||
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Overall CVSS Score | 7.8 | ||
Base Score | 7.8 | Environmental Score | 7.8 |
impact SubScore | 5.9 | Temporal Score | 7.8 |
Exploitabality Sub Score | 1.8 | ||
Attack Vector | Local | Attack Complexity | Low |
Privileges Required | Low | 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 : | |||
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Cvss Base Score | N/A | Attack Range | N/A |
Cvss Impact Score | N/A | Attack Complexity | N/A |
Cvss Expoit Score | N/A | Authentication | N/A |
Calculate full CVSS 2.0 Vectors scores |
Detail
x86 shadow plus log-dirty mode use-after-free 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. Shadow mode maintains a pool of memory used for both shadow page tables as well as auxiliary data structures. To migrate or snapshot guests, Xen additionally runs them in so called log-dirty mode. The data structures needed by the log-dirty tracking are part of aformentioned auxiliary data. In order to keep error handling efforts within reasonable bounds, for operations which may require memory allocations shadow mode logic ensures up front that enough memory is available for the worst case requirements. Unfortunately, while page table memory is properly accounted for on the code path requiring the potential establishing of new shadows, demands by the log-dirty infrastructure were not taken into consideration. As a result, just established shadow page tables could be freed again immediately, while other code is still accessing them on the assumption that they would remain allocated. |
Original Source
Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-42332 |
CWE : Common Weakness Enumeration
% | Id | Name |
---|---|---|
100 % | CWE-416 | Use After Free |
CPE : Common Platform Enumeration
Type | Description | Count |
---|---|---|
Os | 1 | |
Os | 2 | |
Os | 1 |
Sources (Detail)
Alert History
Date | Informations |
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2024-02-04 13:28:04 |
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2023-03-28 05:27:26 |
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2023-03-27 09:27:22 |
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2023-03-27 02:16:03 |
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2023-03-27 02:14:28 |
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2023-03-26 21:27:17 |
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2023-03-26 09:27:18 |
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2023-03-21 17:27:14 |
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