Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Informations
Name CVE-2021-4093 First vendor Publication 2022-02-18
Vendor Cve Last vendor Modification 2023-11-07

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Overall CVSS Score 8.8
Base Score 8.8 Environmental Score 8.8
impact SubScore 6 Temporal Score 8.8
Exploitabality Sub Score 2
 
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Changed 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:C/I:C/A:C)
Cvss Base Score 7.2 Attack Range Local
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4093

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)
50 % CWE-125 Out-of-bounds Read

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 6
Os 2
Os 1
Os 3439
Os 1

Sources (Detail)

Source Url
MISC https://bugs.chromium.org/p/project-zero/issues/detail?id=2222
https://bugzilla.redhat.com/show_bug.cgi?id=2028584

Alert History

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Date Informations
2024-03-12 13:19:57
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2024-02-02 02:28:56
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2024-02-01 12:24:53
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2024-01-12 02:21:33
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2023-12-29 02:19:32
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2023-11-22 02:18:56
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2023-11-07 21:32:45
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2023-09-29 13:13:35
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2023-09-05 13:23:17
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2023-09-05 01:24:22
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2023-09-02 13:21:42
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2023-09-02 01:24:45
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2023-08-12 13:27:45
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2023-08-12 01:23:58
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2023-08-11 13:19:59
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2023-08-11 01:24:46
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2023-08-06 13:17:56
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2023-08-06 01:23:42
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2023-08-04 13:18:18
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2023-08-04 01:24:04
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2023-07-14 13:18:22
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2023-07-14 01:23:51
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2023-06-06 13:10:19
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2023-05-17 13:03:51
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2023-04-13 02:08:18
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2023-03-29 02:20:25
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2023-03-28 12:24:03
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2023-03-25 02:08:08
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2023-01-25 00:27:35
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2023-01-19 21:27:29
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2022-10-11 13:09:50
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2022-10-11 01:23:29
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2022-09-09 02:07:51
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2022-03-11 01:58:57
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2022-03-01 09:23:19
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2022-02-18 21:22:52
  • First insertion