Executive Summary

Informations
Name CVE-2020-5953 First vendor Publication 2022-02-03
Vendor Cve Last vendor Modification 2024-11-21

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Overall CVSS Score 7.5
Base Score 7.5 Environmental Score 7.5
impact SubScore 6 Temporal Score 7.5
Exploitabality Sub Score 0.8
 
Attack Vector Local Attack Complexity High
Privileges Required High 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:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 6.9 Attack Range Local
Cvss Impact Score 10 Attack Complexity Medium
Cvss Expoit Score 3.4 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A vulnerability exists in System Management Interrupt (SWSMI) handler of InsydeH2O UEFI Firmware code located in SWSMI handler that dereferences gRT (EFI_RUNTIME_SERVICES) pointer to call a GetVariable service, which is located outside of SMRAM. This can result in code execution in SMM (escalating privilege from ring 0 to ring -2).

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-5953

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 6

Sources (Detail)

https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf
https://security.netapp.com/advisory/ntap-20220222-0005/
https://www.insyde.com/products
https://www.insyde.com/security-pledge
Source Url

Alert History

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Date Informations
2024-11-28 13:47:05
  • Multiple Updates
2022-04-13 00:23:21
  • Multiple Updates
2022-02-24 21:23:09
  • Multiple Updates
2022-02-10 00:23:00
  • Multiple Updates
2022-02-04 01:49:45
  • Multiple Updates
2022-02-04 01:43:58
  • Multiple Updates
2022-02-03 17:22:54
  • Multiple Updates
2022-02-03 09:22:55
  • First insertion